“If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.”

“By three methods we may learn wisdom: First, by reflection, which is noblest; Second, by imitation, which is easiest; and third by experience, which is the bitterest.”

“Common sense is the genius of humanity.”

“Courage is knowing what not to fear.”

“There are only two mistakes one can make along the road to truth; not going all the way, and not starting.”

“It’s not what happens to you, but how you react to it that matters.”

“Make the best use of what is in your power, and take the rest as it happens.”

“Common sense is not so common.”

“Uneasy lies the head that wears a crown.”

“There is nothing either good or bad but thinking makes it so.”

“Better a witty fool than a foolish wit.”

“We know what we are, but know not what we may be.”

“To the mind that is still, the whole universe surrenders.”