"Heart", "soul", is just a part of consciousness, "mind", it's all us, but we use words to describe different components. If heart = emotion, then yes, all decisions are made by emotion as it underlies all our valuations. "Soul" includes emotion, and everything about us. Sometimes emotions can be manipulated into us, so following emotional states alone or intuition, is not the best way to go about it, but it is often reliable. Someone can tell you a truth that makes you feel bad, then in that case you "stay far from the case" as you say, but it's the truth, so instead of going away from it, you should accept it ;)