“Always use positive words, and never use negative or evil words. Cultivate good thoughts, not bad thoughts. Make sure your intentions are constructive intentions. Never be jealous; be grateful. Be tolerant, peaceful, and honest instead of vengeful. Always be compassionate, never proud and arrogant. Praise God, because God is the Deserving One. You need these in your life. If you can teach yourself to follow these suggestions, you will have a very good life.”

Source: The Discipline of Grace: God's Role and Our Role in the Pursuit of Holiness

The Way of God's Will Chapter 3-3 Witnessing http://www.unification.org/ucbooks/WofGW/wogw3-03.htm Translated 1980.

§ IV
1910s, At the Feet of the Master (1911)
Context: See what gossip does. It begins with evil thought, and that in itself is a crime. For in everyone and in everything there is good; in everyone and in everything there is evil. Either of these we can strengthen by thinking of it, and in this way we can help or hinder evolution; we can do the will of the Logos or we can resist Him. If you think of the evil in another, you are doing at the same time three wicked things:
(1) You are filling your neighbourhood with evil thought instead of with good thought, and so you are adding to the sorrow of the world.
(2) If there is in that man the evil which you think, you are strengthening it and feeding it; and so you are making your brother worse instead of better. But generally the evil is not there, and you have only fancied it; and then your wicked thought tempts your brother to do wrong, for if he is not yet perfect you may make him that which you have thought him.
(3) You fill your own mind with evil thoughts instead of good; and so you hinder your own growth, and make yourself, for those who can see, an ugly and painful object instead of a beautiful and lovable one.
Not content with having done all this harm to himself and to his victim, the gossip tries with all his might to make other men partners in his crime. Eagerly he tells his wicked tale to them, hoping that they will believe it; and then they join with him in pouring evil thought upon the poor sufferer. And this goes on day after day, and is done not by one man but by thousands. Do you begin to see how base, how terrible a sin this is? You must avoid it altogether.

Source: Your Best Life Now: 7 Steps to Living at Your Full Potential

1983

Letter to Larry Callen (14 July 1958), p. 133
1990s, The Proud Highway : The Fear and Loathing Letters Volume I (1997)
Context: I find that by putting things in writing I can understand them and see them a little more objectively. … For words are merely tools and if you use the right ones you can actually put even your life in order, if you don't lie to yourself and use the wrong words.