What does the image and likeness of God mean?

The spirit refines until the dross is gone and the pure spiritual gold remains and grows liker and liker to God, nearer and nearer to His Image.

It may well be that the noblest destiny of the perfected spirit may be union with the God into whose likeness it has grown and whose portion of divinity, temporarily segregated during its pilgrimage, it renders up to Him who gave it.