This phrase actually has it’s origin in the Shakespeare play, Hamlet. The character Polonius is giving advice to his 18 year old son. He tells Laertes, “Neither a lender or borrower be. This above all; to thine own self be true.” Pastor David Dykes provides this commentary about this phrase:
“It combines two concepts that cannot be ignored: self and truth. Americans are involved in a continual love affair with self. Our mantra has become: Take care of #1. Know yourself, love yourself, and be true to your self. Self has become the basic standard for truth. Americans bow down at the altar of Sovereign Self. How far this is from the words of Jesus spoken in Mark 8:34 when He said, “If anyone would come after me, he must deny himself and take up his cross and follow me.” Today, we hear, love self; protect self; promote self–and Jesus said, “Deny your self.” He wasn’t talking about denying yourself some thing–like going without food, or pleasure. He meant to deny self’s desire to constantly climb onto the throne of your life.”
The passage he mentions, Mark 8:34-36, Jesus says this,
“If anyone wants to be My follower, he must deny himself, take up his cross, and follow Me. For whoever wants to save his life will lose it, but whoever loses his life because of Me and the gospel will save it. For what does it benefit a man to gain the whole world yet lose his life? What can a man give in exchange for his life?”
Truth takeaway: To God only are we to be true. This idea of being true to our self sounds good, but is self-centered. If we’re true to our Creator, then we’re ultimately true to who we’re really supposed to be – who he created us to be.