Langston Hughes studied engineering at Columbia University because his father didn't think he could earn a living as a writer, but he never stopped writing. In addition to his poetry, he wrote plays, essays and novels as well as operas and musicals. He also edited a number of anthologies. More biographical information here.
What happens to a dream deferred?
Does it dry up
Like a raisin in the sun?
Or fester like a sore--
And then run?
Does it stink like rotten meat?
Or crust and sugar over--
like a syrupy sweet?
Maybe it just sags
like a heavy load.
Or does it explode?
I've known rivers:
I've known rivers ancient as the world and older than the
flow of human blood in human veins.
My soul has grown deep like the rivers.
I bathed in the Euphrates when dawns were young.
I built my hut near the Congo and it lulled me to sleep.
I looked upon the Nile and raised the pyramids above it.
I heard the singing of the Mississippi when Abe Lincoln
went down to New Orleans, and I've seen its muddy
bosom turn all golden in the sunset.
I've known rivers:
Ancient, dusky rivers.
My soul has grown deep like the rivers.