“The person who seeks knowledge while in his youth is similar to the act of inscribing something upon a rock; while the person who seeks knowledge while he is old is similar to the act of writing something upon the water.”

“If a man who makes to another person, upon a solemn occasion, an assertion, upon which that person acts, he lies under an obligation to make good his assertion.”

“The intolerant can be viewed as free-riders, as persons who seek the advantages of just institutions while not doing their share to uphold them.”

“Ignorance means you didn’t have the necessary knowledge. A person can hardly be blamed for that. Stupidity is the result of knowing what to do but not acting upon that knowledge.”

“It's easy to direct while acting — there’s one less person to argue with.”

“The knowledge that she would never be loved in return acted upon her ideas as a tide acts upon cliffs.”

“Knowledge is just opinion that you trust enough to act upon.”

“Knowledge becomes useless and wasted if it is not acted upon or put into practice.”

“I am like a person who has placed poison in one of two glasses before a person he loves—and looks back upon his act with horror and incredulity—but still does not know from which glass the person will drink.”

“A person who knows but a little will put on an air of knowledge. This is a matter of inexperience. When someone knows something well, it will not be seen in his manner.”