Being True to Yourself
The Imrei Chaim of Vizhnitz was fond of citing this saying of the Kotzker about being true to yourself. The Kotzker used to say: "If I am I because I am I, and you are you because you are you, then I am I and you are you. But if I am I because you are you, and you are you because I am I, then I am not I and you are not you."
Source: Sarfei Kodesh Vizhnitz