мест. ; ед. муж.
1-е лицо myself; 2-е лицо yourself; 3-е лицо himself
это говорит само за себя — it is self-explanatory, it speaks for itself
быть самим собой — be oneself
сам не свой — to be not himself, to be beside himself ( with worry, grief, etc. )
сам себе хозяин — one's own master
сам собой — ( случаться; происходить ) (all) by itself, on its own, of itself, of its own accord/volition, automatically; ( додуматься, добиться ) (all) by oneself
самим собой — ( быть, оставаться ) to be oneself, to remain oneself, to be true to oneself, to remain true to oneself
само собой (разумеется) — it/that goes without saying, naturally, of course, needless to say, obviously, it/that stands to reason