Qui cherche et ne saisit pas ce qui s'offre ne le reverra jamais plus.

All things that are, are with more spirit chased than enjoy'd.

Think, speak, and act. With age comes self-reproach: I might have done more. Therefore now do!

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"?