In science, we must be open to the possibility that our most cherished theories could be wrong.

The quality of ideas seems to play a minor role in mass movement leadership. What counts is the arrogant gesture, the complete disregard of the opinion of others, the singlehanded defiance of the world.

Poor is the man whose pleasures depend on the permission of another.

The saddest thing about love is that not only that it cannot last forever, but that heartbreak is soon forgotten.

如果有人嘲笑您的想法，请将其视为潜在成功的标志！