There is nothing personal in the thunderclap of understanding. The lightning that releases it comes from outside oneself.

Do not undertake a scientific career in quest of fame or money. There are easier and better ways to reach them. Undertake it only if nothing else will satisfy you for nothing else is probably what you will receive. Your reward will be the widening of the horizon as you climb. And if you achieve that reward you will ask no other.

The reward of the young scientist is the emotional th rill of being the first person in the history of the world to see something or to understand something. Nothing can compare with that experience The reward of the old scientist is the sense of having seen a vague sketch grow into a masterly landscape.