[ substantial Quotes ]

4 quotes

Theories are always very thin and insubstantial, experience only is tangible.
Theory
Hosea Ballou

We shall require a substantially new manner of thinking if mankind is to survive.
Thoughts and Thinking
Albert Einstein

It is a great advantage for a system of philosophy to be substantially true.
Advantage
George Santayana

Friendship's the privilege of private men; for wretched greatness knows no blessing so substantial.
Friends and Friendship
Nahum Tate

Research is what I'm doing when I don't know what I'm doing.
[ Research ] Wernher Von Braun