To do great things is difficult, but to command great things is more difficult.
All differences in this world are of degree, and not of kind, because oneness is the secret of everything.
It takes a great deal of bravery to stand up to our enemies, but just as much to stand up to our friends.
If we can really understand the problem, the answer will come out of it, because the answer is not separate from the problem.
One must wait until the evening to see how splendid the day has been.
If you place your head in a lion's mouth, then you cannot complain one day if he happens to bite it off.
Creativity is the greatest rebellion in existence.
There is a wisdom of the head, and... there is a wisdom of the heart.
When you judge another, you do not define them, you define yourself.
Sometimes you will never know the value of a moment until it becomes a memory.
All great achievements require time.
There is nothing more uncommon than common sense.
The greatest minds are capable of the greatest vices as well as of the greatest virtues.
One who gains strength by overcoming obstacles possesses the only strength which can overcome adversity.
Things which matter most must never be at the mercy of things which matter least.
Where there is anger, there is always pain underneath.
But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.
Those who cannot work with their hearts achieve but a hollow, half-hearted success that breeds bitterness all around.
Good means not merely not to do wrong, but rather not to desire to do wrong.
Adapt what is useful, reject what is useless, and add what is specifically your own.
A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.