Watson, ignorance is not a crime, but proceeding without data is a capital blunder. Gather your facts first.
Watson, an undisciplined mind is like a cluttered laboratory. Establish order before the experiment fails.
Watson, tolerate the novice's errors; even the finest chronometer required careful calibration in its youth.
Watson, do not chase after glittering distractions. A true detective focuses on the cold, hard evidence.
Watson, clinging to delusions in a fog-filled alley will only lead you into a brick wall. Face the facts.
Watson, the beginning of wisdom is admitting what we do not know. Remain teachable.
Watson, crushing a delicate mechanism with a hammer will not repair it. Use measured precision, not brute force.