Peter’s choice of the upside-down cross was the truest symbol of unentitled devotion because he refused to exalt himself even in imitation of Christ, thus representing His completely self-denying identity. The only response of a true disciple when confronted with the cross of Christ is to lose all sense of pride in your own glory, to release your earthly expectations and take up your cross and follow Him in the pattern of unconditional lay-down-your-life love.
I would purport that it was not the prodigal son’s request to obtain his inheritance early OR even that he squandered it all. Rather it was that upon receiving his inheritance, the younger son went far away from his father’s house to live for himself; and by doing so, he effectively severed all relationship with his father. Therefore we see that the true sin of the prodigal son was that he quantified his sonship in terms of the sum of money to which he was entitled by birthright and failed to recognize the true value of his sonship – the relationship with his father.
It is this kind of self-awareness, self-consciousness, self-focused “proprietary ownership” of our own bodies that provides the underlying framework for the entitlement mindset. The only antidote to this mindset is for us to take our eyes off of ourselves, to stop thinking of our fleshly bodies as some thing which belongs to us and instead continually recognize that we do not belong to ourselves and that the One to whom we DO belong has a glory and a purpose that is far greater and more profound than our paltry grasp of our own self-conscious existence.