Were I more conversant with literature and its great names, I could go on quoting them ad infinitum and acknowledge my debt for the merit you have been generous enough to find in my work.
If I don't feel confident about my body, I'm not going to sit at home and feel sorry for myself and not do something about it. It's all about taking action and not being lazy. So you do the work, whether it's fitness or whatever. It's about getting up, motivating yourself and just doing it.