It is important that you be true to yourself from the very depths of your nature. It’s no use to pretend to be what you are not. Sooner or later your true nature will show itself. So it’s no use pretending to be what you are not. Just be yourself. Otherwise your trend is only hypocrisy.
Jesus strongly criticized the hypocrisy of the Jewish scribes and Pharisees which you can read in the whole chapter 23 of the gospel of St. Matthew (herewith partly quoted).
“Alas for you, scribes and Pharisees, you hypocrites! You who clean the outside of cup and dish and leave the inside full of extortion and intemperance. Blind Pharisee! Clean the inside of cup and dish first so that the outside may become clean as well” (Mt. 23:25-26).
There’s also a beautiful quotation from William Shakespeare taken from his play “Hamlet” Act 1, sc.3 where he says as follows: “Neither a borrower nor a lender be; For loan oft loses both itself and friend, and borrowing dulls the edge of husbandry. 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. Farewell, my blessing season this in thee!”