I think I can, I think I can

I think I can submit. I think I can submit.

The little engine that could was a story of a tiny train that struggled up a hill with a load of toys for children, puffing

"I think I can. I think I can. I think I can."

I read it to my children, and it inspires me too. Wikipedia reminds me of its last lines:

"As it neared the top of the grade, which had so discouraged the larger engines, it went more slowly. However, it still kept saying, "I--think--I--can, I--think--I--can." It reached the top by drawing on bravery and then went on down the grade, congratulating itself by saying, "I thought I could, I thought I could."