Why? Because to be anything less than holy is to remain unactualised. To be called to life is to be called to sanctity.
All men and women, in every age, wherever we live, whatever status we achieve in life, every single person is born with an immortal soul, created in the Image and Likeness of God. Everyone, without exception therefore, has the potential for sanctity, for holiness, which is, simply stated, the full flowering of our personality.