Albert Barnes on 2 Timothy 2:21

If a man therefore purge himself from these, he shall be a vessel of honour. If a man cleanse or purify himself. Comp. Jn 15:2. The word "these" refers, here, to the persons represented by the vessels of wood and of earth--the vessels made to dishonour, as mentioned in the previous verse. The idea is, that if one would preserve himself from the corrupting influence of such men, he would be fitted to be a vessel of honour, or to be employed in the most useful and honourable service in the cause of his Master. On the word vessel, Acts 9:16.

And meet for the Master's use. Fit to be employed by the Lord Jesus in promoting his work on earth.

(b) "If a man" Jer 15:19 (c) "prepared" 2Ti 3:17