Overbury's poem, 1613. 'All the carnall beauty of my wife, Is but skin deep'
Something beautiful on the outside is vain, transitory, or even evil on the inside.
Proverbs 31:30
Favour is deceitful, and beauty is vain: but a woman that feareth the Lord, she shall be praised.
Matthew 23:27
Woe unto you, scribes and Pharisees, hypocrites! for ye are like unto whited sepulchres, which indeed appear beautiful outward, but are within full of dead men's bones, and of all uncleanness.