Someone was Communist because Berlinguer was a good person. (Giorgio Gaber)
Whatsoever is, is in God, and without God nothing can be, or be conceived. God is the indwelling, and not the transient cause of all things. (Baruch Spinoza)
Timeo Danaos et dona ferentes. (Virgil)
Doubt is not a pleasant condition but certainty is an absurd one. Only fools are certain in what they do or say. (Voltaire)
A man whose reputation is based on his ability at something is a stupid one. Focusing all his energy in only one field, undoubtly he excels in it, but he's not interested in anything else. A man like this is useless. (I-147, Yamamoto Tsunetomo, "Hagakure")