The meaning of life is to die. As solemn as that sounds, the only truly predictable thing that exists in this word, that can be predicted with 100% accuracy, is that you will die someday. The human brain is so advanced, and we have excelled into civilization and innovating technology because of our ability to understand current and past conditions and predict future conditions with a practical level of accuracy. This is true in quite literally every case of innovation that has ever occurred. Even mistaken discoveries, as they are only mistakes because they did not follow our prediction, but whether something does/does not follow prediction is irrelevant, it's its comparison with the prediction that gains us knowledge. All decisions we make use predictive abilities. Everything in our lives is dedicated to using past perception to react and adapt to the present and anticipate the future. So, to me, it only makes sense that the definitive meaning of life is the only definitive prediction we can make. While that might sound depressing, I find it invigorating and motivating. Darkness is the only reason why lightness exists. Death gives the redeemable quality of beauty to life. And following death is the only time humans cannot do our most vital conscious function, predict. It makes life something to be cherished, and celebrated, rather than tarnished and thrown away.