Real knowledge is to know the extent of one's ignorance.
It is possible to fly without motors, but not without knowledge and skill.
Patience is a virtue, and I'm learning patience. It's a tough lesson.
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.
Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.
A child educated only at school is an uneducated child.
All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.
It isn't what we don't know that gives us trouble, it's what we know that ain't so.
Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.
What we know is a drop, what we don't know is an ocean.
Books! I dunno if I ever told you this, but books are the greatest gift one person can give another.
If the facts don't fit the theory, change the facts.
It is what you read when you don't have to that determines what you will be when you can't help it.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
Men are born ignorant, not stupid. They are made stupid by education.
Knowing others is wisdom, knowing yourself is Enlightenment.
There is no authority who decides what is a good idea.
Science is what we have learned about how to keep from fooling ourselves.
Education is the ability to listen to almost anything without losing your temper or your self-confidence.
Investigate, educate and organize the country must progress, productive works and industries are the main avenues at present next to education for the advancement of the country
A spirit of national masochism prevails, encouraged by an effete corps of impudent snobs who characterize themselves as intellectuals.