For he beholdeth himself, and goeth his way, and straightway forgetteth what manner of man he was.
Beholdeth, х katenoeesen (G2657) ... apeleeluthen (G565)] - 'he contemplated himself and half gone his way;' i:e., no sooner has he contemplated his image than he goes his way (James 1:11). 'Contemplate' answers to hearing. "goeth his way," to relaxing the attention after hearing-letting the mind go elsewhere, and the interest pass away; then forgetfulness follows (Alford) (cf. Ezekiel 33:31). 'Contemplate' here, and James 1:23, implies that though cursory, yet some knowledge of one's self, for the time, is imparted in hearing (1 Corinthians 14:24).
And ... and - the repetition expresses hastiness joined with levity (Bengel).
Forgetteth what manner of man he was - in the mirror. Forgetfulness is no excuse (James 1:25; 2 Peter 1:9).