To use the same words is not a sufficient guarantee of understanding; one must use the same words for the same genus of inward experience; ultimately one must have one's experiences in common.

When words are scarce they are seldom spent in vain.

Words spoken cannot be recalled so think twice before you speak.

There are tones of voices that mean more than words.

Understanding is the heartwood of well-spoken words.

If you talk to a man in a language he understands, that goes to his head. If you talk to him in his language, that goes to his heart.