This quote by Carl W. Buechner pretty much says it all, They may forget what you said, but they will never forget how you made them feel. Words can hurt or heal.

On self-development

Every artist was first an amateur.
—Ralph Waldo Emerson

On "busyness"

Being busy does not always mean real work. The object of all work is production or accomplishment and to either of these ends there must be forethought, system, planning, intelligence, and honest purpose, as well as perspiration. Seeming to do is not doing.
—Thomas Alva Edison

On compassion
Have compassion for all beings, rich and poor alike; each has their suffering. Some suffer too much, others too little.
—Buddha

On uncertainty
One never goes so far as when one doesn’t know where one is going.
—Johann Wolfgang von Goethe

On leadership
The secret of a leader lies in the tests he has faced over the whole course of his life and the habit of action he develops in meeting those tests.
—Gail Sheehy

On mastery
Ah, mastery... what a profoundly satisfying feeling when one finally gets on top of a new set of skills ... and then sees the light under the new door those skills can open, even as another door is closing.
—Gail Sheehy

On attitudes
Be civil to all; sociable to many; familiar with few; friend to one; enemy to none.
—Benjamin Franklin

On anxieties
Do not anticipate trouble, or worry about what may never happen. Keep in the sunlight.
—Benjamin Franklin

On teaching tolerance
The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently.
—Friedrich Nietzsche

On good beginnings
Let us watch well our beginnings, and results will manage themselves.
—Alexander Clark

On raising children Educate your children to self-control, to the habit of holding passion and prejudice and evil tendencies subject to an upright and reasoning will, and you have done much to abolish misery from their future and crimes from society.
—Benjamin Franklin

On doubt
The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.
—Bertrand Russell

Our doubts are traitors and make us lose the good we oft might win by fearing to attempt.
—William Shakespeare

On memory

They may forget what you said, but they will never forget how you made them feel.
—Carl W. Buechner

As memory may be a paradise from which we cannot be driven, it may also be a hell from which we cannot escape.
—John Lancaster Spalding

Perhaps even these things, one day, will be pleasing to remember.
—Virgil, The Aenid