For this cause have I sent unto you Timotheus, who is my beloved son, and faithful in the Lord, who shall bring you into remembrance of my ways which be in Christ, as I teach every where in every church.
For this cause - that ye may the better "be followers of me" (1 Corinthians 4:16), through his admonitions.
Sent unto you Timotheus (1 Corinthians 16:10; Acts 19:21-22). 'Paul purposed in the spirit, when he had passed through Macedonia and Achaia, to go to Jerusalem. So he sent to Macedonia Timotheus and Erastus.' Here it is not expressly said, he sent Timothy into Achaia (of which Corinth was the capital), but it is implied, for he sent him with Erastus before him. As be therefore purposed to go into Achaia, the probability is they were to go there also. They are said only to have been sent into Macedonia, because it was the country to which they went immediately from Ephesus. The undesignedness of the coincidence establishes the genuineness of both the letter and the history. In both, Timothy's journey is closely connected with Paul's own (cf. 1 Corinthians 4:19). Erastus is not specified in the letter, probably because it was Timothy who was charged with Paul's orders. The seeming discrepancy shows that the passages were not taken from one another (Paley).
Son - i:e., converted by me (cf. 1 Corinthians 4:14-15; Acts 14:6-7, with 16:1-2; 1 Timothy 1:2; 1 Timothy 1:18; 2 Timothy 1:2). Translate, 'My son, beloved and faithful in the Lord.'
Bring you into remembrance. He does not say, 'shall teach you,' lest they should be hurt at being taught by a youth like Timothy. Timothy, from his spiritual connection with Paul, was best suited to remind them of the apostle's "ways in Christ," - i:e., walk and teaching (2 Timothy 3:10), which they in part, not altogether (1 Corinthians 11:2), had forgotten.
As I teach every where in every church. What the Spirit directed Paul to teach "everywhere" else must be necessary at Corinth (1 Corinthians 7:17). A form of teaching is implied: from it other teachers had departed.