Do or do not, there is no try

I saw a strange little creature on screen.

It made an old spaceship fly.

The wrinkly old... thing, with skin of green, said,

Do or do not, there's no try.

The little man is right, you win or lose.

Some days, that's motivating.

You set your eyes on the prize, tie your shoes.

The day needs dominating.

"Try" leaves room for error, but "Do" does not.

Keep your head up, and aim true.

Do not merely think about what you ought,

For regret is hunting you.

Take the wrinkly green man's advice, you should.

The wrinkly green man is wise.

Say firmly "I can," instead of "I could."

You don't have infinite tries.