The most savage controversies are those about matters as to which there is no good evidence either way.
The reading of all good books is like conversation with the finest men of past centuries.
What we know is a drop, what we don't know is an ocean.
The progressive development of man is vitally dependent on invention.
Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.
Reading without reflecting is like eating without digesting.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
Many much-learned men have no intelligence.
Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.
Most people have never learned that one of the main aims in life is to enjoy it.
Patience is a virtue, and I'm learning patience. It's a tough lesson.
It is possible to fly without motors, but not without knowledge and skill.
A thought is an idea in transit.
I do not know how to teach philosophy without becoming a disturber of the peace.
Know what you are talking about.
Knowing is not enough; we must apply. Willing is not enough; we must do.
Make it a rule never to give a child a book you would not read yourself.
A cynic is a man who knows the price of everything, and the value of nothing.
Liberty without Learning is always in peril and Learning without Liberty is always in vain.
Learning gives creativity, Creativity leads to thinking, Thinking provides knowledge, Knowledge makes you great.