EXPERIENCE

 

The human tongue is a beast that few can master. it strains constantly to break out of its cage, and if it not tamed, it will run wild and cause you grief. 

It is even more damaging for a minister to say foolish things than to do them - Cardinal de Retz

Once the words are out, you cannot take them back. keep them under control. Be particularly careful with Sarcasm

"Fools say that they learn by experience. I prefer to profit by others' experience."