Love never dies a natural death. It dies because we don't know how to replenish its source. It dies of blindness and errors and betrayals. It dies of illness and wounds; it dies of weariness, of witherings, of tarnishings.
The only true wisdom is in knowing you know nothing.
I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.
I don't know that love changes. People change. Circumstances change.
If I read a book and it makes my whole body so cold no fire can ever warm me, I know that is poetry.
You have come into a hard world. I know of only one easy place in it, and that is the grave.
The white man knows how to make everything, but he does not know how to distribute it.
All love shifts and changes. I don't know if you can be wholeheartedly in love all the time.
I like living. I have sometimes been wildly, despairingly, acutely miserable, racked with sorrow, but through it all I still know quite certainly that just to be alive is a grand thing.
You never know what is enough unless you know what is more than enough.
A friend who cannot at a pinch remember a thing or two that never happened is as bad as one who does not know how to forget.
I know of no way of judging the future but by the past.
Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work.
One thing I know: the only ones among you who will be really happy are those who will have sought and found how to serve.
Success is often achieved by those who don't know that failure is inevitable.
Painting is easy when you don't know how, but very difficult when you do.
In baseball, you don't know nothing.
We know what we are, but know not what we may be.
If you would know the value of money, go and try to borrow some.
The most difficult thing in life is to know yourself.