The quality or state of being christlike; the degree to which someone embodies the character and virtues of Jesus Christ.
From christlike (Christ + -like) plus -ness. This abstract noun formation allows Christians to discuss and pursue the state of resembling Christ's character.
Medieval monks spent entire lifetimes trying to achieve 'christlikeness'—they believed copying Christ's suffering was the path to spiritual perfection, which is a pretty intense interpretation.
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