First: you recognize that the 2 sides are always you.

Second: you realize the situations where it is good to use one or the other.

Third: you feel them inside yourself without feeling cut in 2 because that's the way we are. We have a brain that is quite useful when you have to decide which is the shorter way to the mall and then we have feelings, hearts, souls or psyches (whatever you want to call them) that tells us who we are in life, where we want to go, what we need to achieve.