Go cautiously where you suspect depth. Sagacity goes cautiously forward while discretion covers the ground. Nowadays there are unsuspected depths in human intercourse, you must therefore plumb the waters as you go.
Much that well may be thought cannot wisely be said.
A man with great talents, but void of discretion, is like Polyphemus in the fable, strong and blind, endued with an irresistible force, which for want of sight is of no use to him.
One can pass on responsibility, but not the discretion that goes with it.
Judgment is not upon all occasions required, but discretion always is.
I have noticed that nothing I have never said ever did me any harm.