Write down a list of the people you need to forgive and then do so. You can do that just yourself, between you and God, or you can do that in person — but it really is important. You can also turn to the Bible and other personal growth books, or seek out the help of a counselor or a good church. Really take care of those emotional issues, specifically resentment, unforgiveness, anger and frustration, and you’ll see that’s going to really help you cleanse you and detoxify spiritually. It’s going to also help naturally raise your testosterone levels.
But I'm not more aggressive—a behavior change often tied to testosterone. That's not surprising to Robert Sapolsky, ., a neuroendocrinologist at Stanford University and a leading researcher on stress and behavior. "It's really not the case that testosterone 'causes' aggressive behavior," he says. "Instead, it makes the brain more sensitive to social cues that trigger aggression. And in support of that, a guy's testosterone level isn't a very good predictor of how likely he is to be aggressive."