Why are most spiritual master in religion usually men, not women?

Fear of women. People who cannot interact in a healthy way with a woman might need something else to devote themselves to. If they devote themselves to religion, then because of their efforts that religion will develop dysfunctional attitudes towards women, too. At least, that's my working theory.

If I understand correctly, you practice some form of paganism. I'm not familiar with the terms you use "master." It was a little difficult to follow your post. "In fact, I think the master has all the power. He can change his appearance. There are female masters, too, but in the earth we know only a little about things of the gods. There are only several gods that have come here, so if you want to know more clearly, I think you should have a master. He will tell you many things, and secrets to the people who don't have beliefs." That's my best translation of your post. I might be off on what you intend. One of the areas of support for pagan type religions would be the inclusion of women in the priesthood. This would be a motivating force for a woman who is spiritual but doesn't feel she has the opportunity to be a spiritual leader in Christan worship.

"Master" -- the word was taken from the original poster referring to the lead "prophet" of major world religions being a man. Got it!

sorry ,my eglish is not good :-)i cannot undstant the "master" clearly,i think it mean the king of the heaven,

You might actually be giving men too much credit. Women in the workforce achieve less, too. It might be some idea of assertiveness or social aggressiveness that plays a part here. It might be that men devote themselves to the priesthood because they don't have the option of the rewarding role of loving mother. You seem to be implying intent and organization. Men might not be so well organized as you seem to think. --- It is perfectly feasible for a woman to have a child and leave it with a loving father while she goes off to preach. It is certainly possible for a woman to take a man's role and a man to take a woman's. I, for instance, might have thought the option of staying home with my daughter all day was a good idea! I love children, always have. Kids are the most wonderful playmates. It would also be reasonable for a priestess to select the most spiritual men in her congregation and have a child by them. Entrusting them with the child's upbringing as a sort of spiritual service to the "Mother Goddess" because it allows the priestess to devote herself to preaching. This just doesn't happen. I can't explain why it doesn't happen. It might have something to do with the aggressive / assertive man behaviors. Like a child banging on pots and pans trying to get someone to notice them. Boy children are different than girl children. These differences might go a long way towards explaining why men and women value different things -- and tend to take different life and career paths.

I tend to agree. If women are not fairy represented in the religious leadership, their point of view will be more easily dismissed.