I've been absolutely terrified every moment of my life - and I've never let it keep me from doing a single thing I wanted to do.

Oh mein Sohn, es wird auch berichtet, dass Luqman (der Weise) seinem Sohn riet: "Oh Sohn, du möchtest doch nicht, dass der Hahn gescheiter ist als du. Er kräht zur Morgendämmerung und du schläfst weiter.

Time will always exist but you will not. Stop your mind from drifting off into the future if you aren't there yet. Cherish the seconds of your life, live now not tomorrow. -Enlightened-

Well, it does make you realize that life, even at its longest, is still very short.

Why always "not yet"?  Do flowers in spring say "not yet"? 

Seize the day, take hold of it, and make it whatever you want.