Mothers are fonder than fathers of their children because they are more certain they are their own

A person who never made a mistake never tried anything new.

Spiritual relationship is far more precious than physical. Physical relationship divorce from spiritual is body without soul.

Subdue your appetites, my dears, and you've conquered human nature.

Man needs his difficulties because they are necessary to enjoy success.

Design is not just what it looks like and feels like. Design is how it works.

It is a far, far better thing that I do, than I have ever done; it is a far, far better rest that I go to, than I have ever known.

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.

A boy's story is the best that is ever told.

I was always fascinated by engineering. Maybe it was an attempt maybe to get my father's respect or interest, or maybe it was just a genetic love of technology, but I was always trying to build things.

A jug fills drop by drop.

The only thing that interferes with my learning is my education.