It means Man made in the image and likeness of God has lost his dignity by his disobedience ,being a child of God he lost the grace which was freely given him ,since man himself was to restores it Phi 2:1-11 ,But he can’t, so Jesus became Man to restore that grace John 1:16 From his fullness we have all received, grace upon grace. 17 The law indeed was given through Moses; grace and truth came through Jesus Christ. Psalms 8:4 what are human beings that you are mindful of them,
mortals that you care for them?5 Yet you have made them a little lower than (Angles)God, and crowned them with glory and honor.
Jesus restored the dignity by being a child of God in the image and likeness of god as he was little lower than the angles has now become a like angles or companion Revelation 22:9 but he said to me, “You must not do that! I am a fellow servant with you and your comrades[[b] the prophets, and with those who keep the words of this book. Worship God!”
Catechism of the Catholic Church
 The dignity of the human person is rooted in his creation in the image and likeness of God ( article 1 ); it is fulfilled in his vocation to divine beatitude ( article 2 ). It is essential to a human being freely to direct himself to this fulfillment ( article 3 ). By his deliberate actions ( article 4 ), the human person does, or does not, conform to the good promised by God and attested by moral conscience ( article 5 ). Human beings make their own contribution to their interior growth; they make their whole sentient and spiritual lives into means of this growth ( article 6 ). With the help of grace they grow in virtue ( article 7 ), avoid sin, and if they sin they entrust themselves as did the prodigal son1to the mercy of our Father in heaven ( article 8 ). In this way they attain to the perfection of charity.