Never explain: your friends don't need it and your enemies won't believe it anyway.

Of all lessons to learn, learning to learn is the greatest.

There's all the time in the world and none to waste.

Being happy wouldn't be much of any challenge at all if we would forget our troubles as fast as we forget our blessings.

That is not dead which can eternal lie, And with strange aeons even death may die.

We don't know one millionth of one percent of anything.