How then was man at first like to God?

Answer

Man at first was like to God, thus: At first, man was wise, man was holy, and man was righteous, and man was perfect (; ; ).

Read the 3 proof texts (KJV)

Colossians 3:10: And have put on the new [man], which is renewed in knowledge after the image of him that created him:
Ephesians 4:24: And that ye put on the new man, which after God is created in righteousness and true holiness.
Ecclesiastes 7:29: Lo, this only have I found, that God hath made man upright; but they have sought out many inventions.