I first recognized this trait in myself.这句话为什么用in?in oneself

I first recognized this trait in myself.这句话为什么用in?in oneself I find myself in troubles.这句话有错吗? I believe in myself if I walk in this city myself,i'll probably I lost myself,in this dark dark night. i recently won first prize in the competition.这句话为什么是对的 为什么这句话有语病?Six years later,when I won the first prize in Nati In oneself with oneself呢? I want a strong believe in oneself find oneself in oneself bury in find happiness in oneself