Thomas Henry Huxley

"Careful observation is the foundation of all scientific progress."

"If a little knowledge is dangerous, a lot is even more so."

"Facts do not cease to exist because they are ignored."

"There is no greater monument to human ignorance than the assumption of human importance."

"The greatest value of teaching is not imparting information but developing the mind."

"Nature never wears the same expression twice."

"I do not believe in the creed of any sect; but I do believe in God."

"The past is the scaffold upon which the future is built."

"Real knowledge consists in knowing things and not merely words."

"The rung of a ladder was never meant to rest upon, but only to hold a man's foot long enough to enable him to put the other somewhat higher."

"Every man is a discoverer if he will but look about him."

"Our greatest dangers are not from external foes but from ignorance."

"The universe, so far as we know it, is a wonderful and complex system."

"The great tragedy of Science is the slaying of a beautiful hypothesis by an ugly fact."

"Irrationally held truths may be more harmful than reasoned errors."

"The deepest principle of human nature is the craving to be appreciated."

"A man's worst difficulties begin when he is able to do as he likes."

"If a little knowledge is dangerous, where is the man who has so much as to be out of danger?"

"The chess-board is the world, the pieces are the phenomena of the universe, the rules are what we call the laws of Nature."

"Everybody should sit in meditation. Half an hour of real meditation is always good."

"I have never been able to understand why the umpire in cricket is not allowed to chew gum."

"The basis of theology is to make peace with oneself. Then peace with our fellows. Then peace with God."

"Do not pretend to conclusions you have not reasoned out for yourself."

"I took thought, and invented what I conceived to be the method of Evolution."

"Skepticism is the highest of duties; blind faith the one unpardonable sin."

"History warns us that it is the customary fate of new truths to begin as heresies."

"A person who is not genuinely happy doesn't know what real happiness is."

"The ethics of scientific investigation must be governed by the golden rule."

"Wonder is the foundation of all philosophy, inquiry its driver, and truth its goal."

"Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen."