Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man 

does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence.  —Albert Einstein 

Albert Einstein also said, "The important thing is not to stop questioning. Curiosity has its own reason for existing. One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend a little of this mystery every day. Never lose a holy curiosity."