This above all: to thine own self be true, And it must follow, as the night the day, Thou canst not then be false to any man.
~ William Shakespeare
In the case of multiple personalities, one may be true to oneself and one’s other self and one’s other, other self still… without living a duplicitous life. It’s easier to recall many truths than to remember one lie. Live your truths, no matter how unsavory you believe them to be, for they are all yours.