that ye also - as I have been discussing things relating to you, so that ye also may know about me (compare Col 4:7, Col 4:8). Neander takes it, “Ye also,” as well as the Colossians (Col 4:6).
my affairs - Greek, “the things concerning me.”
how I do - how I fare.
Tychicus - an Asiatic, and so a fit messenger bearing the respective Epistles to Ephesus and Colosse (Act 20:4; 2Ti 4:12).
a beloved brother - Greek, “the beloved brother”; the same epithet as in Col 4:7.