Erring on the side of over-caution is costly, and so is erring on the — Caution

"A venerable caution will forever be true when advice from Wall Street is contemplated: Don’t ask the barber whether you need a haircut."

"When once — which every body must be — you are convinced of the wickedness and deceit of men, it is impossible to preserve untainted your own innocence of heart. Experience will prove the depravity of mankind, and the conviction of it only serves to create distrust, suspicion — caution — and sometimes causelessly."

"Whatever you do, be on your guard, for whoever does so keeps the commandments."

"Above all the things that you guard, safeguard your heart, for out of it are the sources of life."

"Your spiritual teachers caution you against enquiry — tell you not to read certain books; not to listen to certain people; to beware of profane learning; to submit your reason, and to receive their doctrines for truths. Such advice renders them suspicious counsellors. By their own creed you hold your reason from their God. Go! ask them why he gave it."

"The shrewd one sees the danger and conceals himself, but the inexperienced keep right on going and suffer the consequences."