As a matter of self-preservation, a man needs good friends or ardent enemies, for the former instruct him and the latter take him to task.

Whether you think you can, or you think you can't - you're right.

It isn't what we say or think that defines us, but what we do.

Your time is limited, so don't waste it living someone else's life.

I've searched all the parks in all the cities and found no statues of committees.