Twenty years from now, you will be more disappointed by the things that you didn't do than by the ones you did do.
Do not wish for tasks to equal your strength. Instead wish for strength equal to your tasks.
There is always one moment in childhood when the door opens and lets the future in.
A good idea will keep you awake during the morning, but a great idea will keep you awake during the night.
Marilyn Vos Savant
When one door closes another door opens; but we so often look so long and so regretfully upon the closed door, that we do not see the ones which open for us.
Alexander Graham Bell