Make your work to be in keeping with your purpose
Leonardo da Vinci
Study without desire spoils the memory, and it retains nothing that it takes in.
If there's a single lesson that life teaches us, it's that wishing doesn't make it so.
It’s no use going back to yesterday, because I was a different person then.
In the end, we only regret the chance we didn’t take.
Yesterday is not ours to recover, but tomorrow is ours to win or lose.
Lyndon B. Johnson