Argument from the meaning of life
The argument from the meaning of life states that God must exist because without God, human life would have no objective meaning. Conversely, apologists sometimes assert that a meaning of life exists and that this implies God exists too. No one wants to admit that their life is void of meaning and purpose, which provides the emotional basis for the argument.
- "If there were no eternal consciousness in a man, if at the bottom of everything there were only a wild ferment, a power that twisting in dark passions produced everything great or inconsequential; if an unfathomable, insatiable emptiness lay hid beneath everything, what would life be but despair?"
More recent apologists have written:
- "Without God, life has no purpose, and without purpose, life has no meaning. Without meaning, life has no significance or hope. "
- "If all the events are meaningless, then what can be the ultimate meaning of influencing any of them? Ultimately it makes no difference. "
Argument from justice is sometimes combined with this argument because it provides consequences to moral actions which is argued to be necessary for those actions to be meaningful.  This argument is related to the transcendental argument because both assert objective things exist that depend on the existence of God.
What does the "meaning of life” mean?
The meaning of life refers to the significance or purpose of human existence. Ancient and Medieval philosophy in the West has tended to only consider "intrinsic" values, roughly meaning a value is "good for its own sake",  as potential candidates for the meaning for life. Similarly, most religions consider metaphysical notions such as ethics or our relationship with God to be the purpose of life. It is usually assumed that the purpose of life is uniform for all humans, invariant to time and is good no matter regardless of who attains it. This is the conception of the "meaning of life" used in the argument.
Enlightenment philosophy changed the focus of meaning to "natural rights" of humans, which do not necessarily depend on God. Humanism and utilitarianism are similar in that they are concerned with improving the overall "greater good of humanity". These views implicitly suppose that a significance for human life can exist without recourse to God.
Existentialism and other branches of modern philosophy have tended to consider objective meaning of life as non-existent or conceptually meaningless. The possibility of a subjective or person specific "meaning of life" is accepted.
"This—is now MY way,—where is yours?" Thus did I answer those who asked me "the way." For THE way—it doth not exist! 
We know what it means for a human action to have purpose because we experience it every day. However, it is unclear if the concept of "purpose" can be properly applied to an entire life. 
Problems With This Argument
Appeal to emotion
The argument suggests that we should believe in a god, even if it does not exist, so that we can feel the self esteem boost of our lives having a higher meaning. If a conclusion is accepted solely on its emotional appeal, it is a logical fallacy. A person can still have a subjectively meaningful, fulfilling and memorable life, even if objective meaning does not exist. Existentialism is a branch of philosophy concerned with existence without objective meaning, or the need to create one's own meaning. Conversely, some have argued that human mortality followed by non-existence is the only way for human life to have meaning. The rareness and uniqueness is thought to make it special.
- "It's important not to confuse the notion of "pointless" in Premise 2 with notions like "not worth living" or "expendable." [...] But we can very well maintain that each human life is precious—is worth living, is not expendable—without maintaining that each human life has a purpose in the overall scheme of things. "
- "[Being] aware of our own mortality makes us aware of the value of life. We realise that life is too precious to be wasted and so feel invigorated. [...] We feel grateful just to be alive, to have been born into this world for a short time. We appreciate the beauty and wonder of nature, the people in our lives, and mundane everyday things, such as food, water and the weather. [...] Encounters with death also make us more present-centred. "
Objective meaning of life might not exist
The argument assumes there is an objective meaning to life. However, this is not necessarily true and difficult to establish with any certainty. Although we might feel uncomfortable admitting that our life does not serve an eternal purpose, we should not simply assume that it does have a purpose. There is no evidence that any objective meaning of life exists. While religious believers claim their idea of the meaning of life is objective, without some way of verifying it, it is likely to be another a subjective concept. Simply claiming their concept of meaning is objective does not make it objective.
Free will and predestination
- Main Article: Free Will vs. Predestination
If meaning is predestined, then either God is unjust and does not give atheists the same facility to meaning, or is impotent, and can't. Secondly, free will and "designed" meaning cannot exist together, as they are mutually exclusive.
Christian idea for the meaning of life is questionable
It is important to determine what the theist believes the meaning of life actually is. In some cases, they say the meaning of life is to worship God. Subservient worship is not going to be most people's idea of a meaningful life.
Alternatively, God may have determined the purpose of humans is to be quite different from what humans currently belief and, for all we know, is possibly unachievable. This would hardly be a comforting concept.
God and the objective
If God exists, what makes that God's view of the purpose of human life more privileged than any other conception? Creating something does not automatically confer the creator's interpretation on the object, as seen with human creations. An object created for one purpose may be equally (or more) suitable for alternative purposes. God may set some criteria for what he considers to be valuable but that does not automatically imply those values have objective value in themselves.
Various possibilities are ignored by the argument but are just as valid as the conclusion. The objective meaning of life could have spontaneously created itself, be necessarily existent or created by a non-divine agent. It could be different for each person, even if there is a God.
Claim that Earthly life is worthless
- "Do not love the world or the things in the world. If anyone loves the world, the love of the Father is not in him. For all that is in the world—the desires of the flesh and the desires of the eyes and pride in possessions—is not from the Father but is from the world. And the world is passing away along with its desires, but whoever does the will of God abides forever."
- "To blaspheme the earth is now the dreadfulest sin, and to rate the heart of the unknowable higher than the meaning of the earth!"
If we only have Earthly life and non-believers consider there to be a subjective meaning to life, it is arguable that it is Christians who devalue Earthly life are the real nihilists.
No reliable means to determine objective meaning
If God created an objective meaning of life, we do not have reliable means to determine if it exists or what it entails. Holy books and testimony of revelation are contradictory, mythological and vague.
Begging the question
Variant: argument from the intolerability of insignificance
A variant of the argument runs: 
- It is intolerable to be insignificant.
- Only God can provide significance (because he is eternal).
- God exists.
- ↑ Søren Kierkegaard, Fear and Trembling
- ↑ Rick Warren, The Purpose Driven Life: What on Earth Am I Here for?
- ↑ 3.0 3.1 William Lane Craig, The Absurdity of Life without God 
- ↑ JW Gray, What Does “Meaning of Life” Mean? December 29, 2009 
- ↑ Friedrich Nietzsche, Thus Spake Zarathustra 
- ↑ 6.0 6.1 6.2 6.3 Rebecca Newberger Goldstein, 36 Arguments for the Existence of God: A Work of Fiction, 2011
- ↑ Steve Taylor, Out of the Darkness, November 26, 2011 
- ↑ OpenBible, 42 Bible Verses about Worldly Things 
- ↑ Friedrich Nietzsche, Thus Spake Zarathustra 
- There are no atheists in foxholes - also deals with the emotional impact of one's own mortality.
- Moral nihilism
- God is dead
- Meaning of life on wikipedia