It was no good to look back, to apologize for what had happened, or to wonder what could have been different.

If only. Those must be the two saddest words in the world.

Do not regret the past; aim to carry your tears when you perceive the memories. Those tears may erect a vision.

There is no more disastrous mania, no more dangerous whim, than the speculation over roads not taken.

The only thing I regret about my past is the length of it. If I had to live my life again I'd make all the same mistakes - only sooner.

Do not look back and grieve over the past, for it is gone;
and do not be troubled about the future, for it has yet to come. Live in the present, and make it so beautiful that it will be worth remembering.