Put on (ενδυσασθα). First aorist middle infinitive of ενδυω (-νω), for which see Colossians 3:10.

The new man (τον καινον ανθρωπον). "The brand-new (see Ephesians 2:15) man," though τον νεον in Colossians 3:10.

After God (κατα θεον). After the pattern God, the new birth, the new life in Christ, destined to be like God in the end (Romans 8:29).