The supreme command of the age is authenticity. Look within, find your true self, follow your heart, and let nothing, no tradition, no obligation, no God, override the sovereign voice inside you. It sounds like pure freedom, and it holds a real truth worth keeping: you are not merely a set of roles, and betraying your deepest convictions is a kind of slow death. So far, so good.
But lean on the assumption underneath it, that the heart is a trustworthy compass, and it wobbles badly. Anyone honest knows the heart is not one clear voice but a noisy crowd of them, some noble and some petty, some brave and some cruel, some frightened and some vain. 'Follow your heart' has launched as much abandonment and harm as it has courage, because the heart that says leave your family for your happiness and the heart that says love them through the hard years are the same organ on different days. Jeremiah said it without flattery: the heart is 'deceitful above all things.' The self is not a pure oracle to be obeyed. It is also a thing that needs healing.
The heart is not a compass pointing north. It is a crowd of voices, and some of them are lying to you.
There is a deeper trap, too. A self manufactured entirely from within is exhausting to sustain and terrifyingly fragile, because you are both the author and the anxious audience, forever unsure you got it right. Christianity offers a truer self, not one you invent under pressure but one you are given: 'your life is hid with Christ in God.' Your deepest identity is not a project you must complete or defend, but a gift held by Someone stronger than your moods. That is a far more solid ground to stand on than the shifting weather of a heart, and it is the only kind of self that can bear the weight of actually being known.