What goes up must come down. Entropy wins in the end and you’re gonna die.
But gravity doesn’t always mean crashing down onto the ground. If your velocity is high enough, you can harness the gravity to send you sailing to the next star. (Sure, it will take a few hundred thousand years at sublight speeds, but you understand the sentiment….)
[The] art to flying… lies in learning how to throw yourself at the ground and miss.