I know that I am intelligent，because I know that I know nothing.
Life is a great big canvas，and you should throw all the paint on it you can.
Life lies not in living but in liking.
Understanding a question is half an answer.
Death may be the greatest of all human blessings.
I am not an Athenian or a Greek，but a citizen of the world.
Sometimes you put walls up not to keep people out，but to see who cares enough to break them down.
Life is measured by thought and action，not by time.
Life is a leaf of paper white，thereon each of us may write his word or two.
I cannot teach anybody anything。I can only make them think.
The hottest love has the coldest end.
Life is just a series of trying to make up your mind.
Make yourself necessary to someone.
Life is like music。It must be composed by ear，feeling and instinct，not by rule.
The great use of life is to spend it for some thing that overlasts it.
Life consists not in holding good cards，but in playing well those you hold.
The value of life lies not in the length of days，but in the use we make of them.
Beware the barrenness of a busy life.