A man should look for what is, and not for what he thinks should be.
A perfection of means, and confusion of aims, seems to be our main problem.
All these primary impulses, not easily described in words, are the springs of man's actions.
Anyone who doesn't take truth seriously in small matters cannot be trusted in large ones either.
As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality.
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.
Confusion of goals and perfection of means seems, in my opinion, to characterize our age.