Each of us in his own person feels that a high-hearted indifference to life would expiate all his short-comings.
~ William James, Varieties of Religious Experience
It certainly helps – but there’s a difference between pretending not to care about things you really do care about and not caring overmuch about things you cannot change. The former is culpable; the latter, I think, is only healthy. It’s difficult sometimes to know which failings are fixable and which are permanent features of your character. Once your chronic short-comings are identified, however, it’s better (in most cases) to forgive yourself and take refuge in some high-hearted indifference. A perfectly earnest life is perfectly unlivable.