One of my favorite poets, Archibald Macleish. He’s particularly gifted at sidling up to the existential and extracting with such clarity:

There is no dusk to be,
There is no dawn that was,
Only there’s now, and now,
And the wind in the grass.

Days I remember of
Now in my heart, are now;
Days that I dream will bloom
White the peach bough.

Dying shall never be
Now in the windy grass;
Now under shooken leaves
Death never was.

From Archibald Macleish “An Eternity,” Collected Poems 1917 to 1982. Houghton Mifflin: New York, 1985