Be advised that all flatterers live at the expense of those who listen to them. Jean de La Fontaine
Be advised what thou dost discourse of, and what thou maintainest whether touching religion, state, or vanity; for if thou err in the first, thou shalt be accounted profane; if in the second, dangerous; if in the third, indiscreet and foolish. Walter Raleigh
There is no helping him who will not be advised. Italian Proverb