"I think a person has to believe in something, or search out some kind of faith; otherwise life is empty, nothing. How can you live not knowing why the cranes fly, why children are born, why there are stars in the sky... Either you know why you live, or it's all small, unnecessary bits."

Next Quote

Not only after two or three centuries, but in a million years, life will still be as it was; life does not change, it remains for ever, following its own laws which do not concern us, or which, at any rate, you will never find out. Migrant birds, cranes for example, fly and fly, and whatever thoughts, high or low, enter their heads, they will still fly and not know why or where. They fly and will continue to fly, whatever philosophers come to life among them; they may philosophize as much as they like, only they will fly.

— Anton Chekhov