>>107781379I'm not sure 'devotion' to the 'human cause' is the correct way - I think it's both his own sense of self as an active participant in humanity on Earth and an attachment to his humanity (represented by the Kents, Lois, and in the current mainline canon, Jonathan Samuel, as well as his human and otherwise Earthbound friendships, e.g. the League and associates, the Daily Planet, etc.).
>communicate them to othersAgain, I'm not sure this is precise; Superman wants to help, what they convey's, I think, can be open to interpretation by those 'helped' and those impacted by it - anything else is much too subjective to interpretation, but I don't think Superman specifically communicates any one thing or another.