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.
A few Einstein quotes I pulled from quotationspage.com:
Einstein on Wikipedia:
The most beautiful thing we can experience is the mysterious. It is the source of all true art and science.