No workman without tools,/ Nor Lawyer without Fools,/ Can live by their Rules.

The best investment is in the tools of one's own trade.

The heart of a fool is in his mouth, but the mouth of a wise man is in his heart.

Fools multiply folly

A bad workman always blames his tools.

Lawyers, Preachers, and Tomtits Eggs, there are more of them hatch'd than come to perfection