Concern for man and his fate must always form the chief interest of all technical endeavors. Never forget this in the midst of your diagrams and equations.
It is man's social nature which distinguishes him from the brute creation. If it is his privilege to be independent, it is equally his duty to be inter-dependent. Only an arrogant man will claim to be independent of everybody else and be self-contained.
Life does not consist mainly, or even largely, of facts and happenings. It consists mainly ofthe storm of thought that is forever flowing through one's head.