The spirit of a man will sustain his infirmity; but a wounded spirit who can bear?
Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof.
I think these verses go hand-in-hand.
We often see people, who have a spirit to live, overcome serious injury as well as those who do not have that spirit to live succumb to a minor wound. The spirit truly affects the physical. While the saying is, "Sticks and stones may break my bones, but words will never hurt me," it is the farthest from the truth.
Words can bring life!
When you see someone down, speak encouraging words to uplift their spirit. An uplifted spirit can help someone through the hardest of times.