Invictus:

Out of the night that covers me.
black as the pit, from pole to pole.
I thank whatever gods may be,
for my unconquerable soul.

In the fell clutch of circumstance,
I have not winced nor cried aloud.
Under the bludgeonings of chance,
my head is bloody but unbowed.

Beyond this place of wrath and tears
looms but the horror of the shade.
And yet the menance of the years
finds and shall find me unafraid.

It matters not how strait the gate,
how charged with punishments the scroll.
I am the master of my fate,
I am the captain of my soul.

It's the only (english) poem I know by hard.
Many people know the last 2 lines.