If I talked to other people the way I talk to myself, I don't think I'd have very many friends. Why can't I be nicer to myself?
For example, there's a guy I like in my Bible study group. Part of me holds back out of fear, another part is confident in myself, and yet, also, a little voice says in my head "Rachel, don't get your hopes up. Look how many other thinner, prettier, more outgoing girls are here." What if I said that to my friend who was crushing on a guy? She would never want to talk to me again. She'd be hurt. So why do I insist on doing that to myself?
Maybe I should start talking to myself the way I'd talk to one of my dear friends. Or, even better...the way God sees me. Or not even talk to myself at all, and just talk to Him instead.