From The Magic of Space, part of a commentary that can help us get beyond the unfortunate karmas of erroneous perception and unhelpful thoughts and speech. This nugget is from Chapter 4, "Fear of Inner and Outer Space."
You must learn to discriminate between truth and falsehood, and you must learn to be true in thought, and word, and deed. There are many untrue thoughts in the world, and many superstitions, and one who is enslaved by them cannot make progress. Therefore you must not hold a thought simply because many other people hold it, or because it has been believed for centuries, but must think it through for yourself, and judge for yourself whether it is reasonable. Your thought about other people must also be true, and you must never think things of them that you do not really know to be true.
Do not suppose that they are always thinking of you. If someone has done something which you think will harm you, or says something unkind which you think applies to you, do not immediately think, "he meant to injure me." He probably did not think of you at all, for each soul has its own troubles, and its thoughts turn chiefly around itself. If a man has spoken angrily to you, do not think, " he hates me; he wishes to hurt me" - for probably someone or something else made him angry, and simply because he happened to meet you he turned his anger upon you. Of course he is acting foolishly, for all anger is foolish - but simply because of this you must not think untruly of him.
You must be true in your speech, also - accurate, and without exaggeration. Never attribute motives to another person - he may be acting from reasons which have never entered your mind. If you hear a story against anyone, be careful not to repeat it. It may not be true - but even if it is, be careful; it is far kinder to say nothing. Be true in your actions, and never pretend to be other than you are, for all pretense is a hindrance to the pure light of truth which should shine through you. You must also discriminate between the selfish and the unselfish, for selfishness has many forms, and when you think you have finally killed it in one form, it arises in another as strongly as ever. You must discriminate in another way, also - learn to distinguish the God in everyone and in everything, no matter how evil he or it may appear on the surface. You can help others through that which you have in common with them. Learn how to arouse the spark of God in them, and learn how to appeal to the Christ in them.