The most I can do for my friend is simply be his friend.

Real knowledge is to know the extent of one's ignorance.

The question isn't who is going to let me; it's who is going to stop me.

Happiness is a direction, not a place.

Don't judge each day by the harvest you reap but by the seeds that you plant.

Act as if what you do makes a difference. It does.

No legacy is so rich as honesty.

Keep your face to the sunshine and you cannot see a shadow.

We boil at different degrees.