Power of the tongue

I was taught that the power of life and death lies in the tongue... Even in the heat of arguments, I try to control what I say and maybe that is why I get frustrated and throw things instead/ break stuff.... I wish I could fast forward a video of my life and see how certain things turn out, how it will all end up. I fear certain things...I don't think we are heading in the right direction but right now I don't have the strength to do anything about it.. I'm worn out and certainly can't debate anymore about anything. Thinking back, I realize I've never really been with people who are activists or great debaters..its always been some talking, complaints and some easy going times with friends..it's just something I'm not used to and I shouldn't try and be someone I am not if I dont have what it takes.