A thought is an idea in transit.
Investigate, educate and organize.
The highest result of education is tolerance.
Necessity is the mother of invention.
Don't worry that children never listen to you; worry that they are always watching you.
To every action there is always an equal and opposite or contrary, reaction
It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.
One test of the correctness of educational procedure is the happiness of the child.
An investment in knowledge pays the best interest.
Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.
Better know nothing than half-know many things.
Those who fail to learn the lessons of history are doomed to repeat them.
Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.
You can never learn less, you can only learn more.
Courage, conviction and confidence.
To educate a person in the mind but not in morals is to educate a menace to society.
In mathematics you don't understand things. You just get used to them.
I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion
The man who does not read good books has no advantage over the man who can't read them.
Knowledge becomes evil if the aim be not virtuous.
It took us three years to build the NeXT computer. If we'd given customers what they said they wanted, we'd have built a computer they'd have been happy with a year after we spoke to them - not something they'd want now.