I am glad you are aware that our relation to God (who is, of course, invisible, and easily enough “handled” by us mortals in whatever way we choose) involves most of all our relation to our fellow human beings. “This is pure religion, to visit the orphans and widows.” “What does God require of you, but to do justice, etc.” Isaiah thunders that God is not impressed with all our church going, prayers, and so forth, but by the way we treat family, friends, even foes. It took me, and the church in general, long enough to recognize this. Doing it is still something else.
So, I used to have the notion that there was nothing wrong with my being angry with others, including fellow Christians, as long as I didn’t make a congressional case out of it, either by punching him in the nose, telling him to his face, or telling others. I thought I was at least doing myself some good by thinking what I felt.
But psychology confirms what the Bible says plainly, that I only do myself harm by all that bitterness, anger, etc. And what is more, I really “reach” him with all that negativism, in much the same way you can put a hex on a person; we are psychologically , spiritually connected and influence each other, unseen and invisible, through such vibes. If we can put a hedge around a person by means of our prayers, we can put a curse on him by our negative thoughts.
“OK, that’s just what I want,” you say. Except, every other person is in the very same battle that you are, versus Satan, uncongenial human beings, the cursed or fallen world (such as gnats or gnawing physical troubles, etc.) and even the “knee-jerks” of our old nature, presumably dead, but still “kicking.” He or she (your “enemy”) needs all the help they can get. In our common conflict with the devil, why make it any harder than it already is for him or her?
Which is what the Bible means by “doing unto others as you would like them to do to you;” or even “turning the other cheek,” which is not a physical thing, but not retaliating in kind for an obvious disservice. By leaving “hands off,” even in our thinking, we can let God work on such a person. Often they are themselves aware of the fault we dislike in them, and would get farther in their battle against it if we were not stiffening their bad position by our attack on it (like not criticizing a guy’s girl, so that he is a little freer to see her faults, rather than reacting against you by defending her).