My wife continues to non trusting that Incan do anything for myself which is totally not true because I have recently done things for myself and she knows it. Since the beginning of our marriage she has always been very demeaning, and I have put up with it form20 years. There is not alot of love left here wish it was not that way.
Recently you've been doing things for yourself... but for 20 years she's always believed that you can't do anything on your own. How about you change the opinions inside her head by continuing to do what you started doing recently? (doing things for yourself) After all, a woman will speak her mind... especially if she's married to a kind husband, a man she knows he would never hit her or hurt her feelings in any way; even if she hurts him, he wouldn't hurt her back. So when she feels so secure with you, so safe, she will speak whatever crosses her mind.
And what I'm suggesting is that, instead of "asking" (or expecting her) to stop saying that; to stop saying what's on her mind; how about you actually change it from within her mind? And the one way to do that is to keep on doing what you've been doing lately. Do that and keep on doing it, with a smile on your face... and I can guarantee you that it's only a matter of time before she realizes that actually, YES YOU CAN.