"Truth is strong enough to overcome all human sophistries."
"But the fact is, the truth is a very dangerous thing and most people aren’t very careful with it because most of the time, they don’t even recognize it. Consequently, they end up lying when they think they’re being truthful, and spilling the truth when they think they’re covering up."
"To know that we know what we know, and that we do not know what we do not know, that is true knowledge."
"...The virtue of truth gives another his just due. Truthfulness keeps to the just mean between what ought to be expressed and what ought to be kept secret: it entails honesty and discretion. In justice, "as a matter of honor, one man owes it to another to manifest the truth."
"Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth."
"If you would be a real seeker after truth, you must at least once in your life doubt, as far as possible, all things."
"If I hear the Way [of truth] in the morning, I am content even to die in that evening."