Albert Barnes Commentary Zechariah 1:3

"Therefore say thou unto them, Thus saith Jehovah of hosts: Return unto me, saith Jehovah of hosts, and I will return unto you, saith Jehovah of hosts." — Zechariah 1:3 (ASV)

Therefore say you — Literally, “And you say,” that is, this having been so, it follows that you say or must say, Turn ye unto Me. In some degree they had turned to God, for whose sake they had returned to their land; and again when, after some negligence (Haggai 1:2–11), they renewed the building of the temple, and God had said, I am with you (Haggai 1:13). But a more inward, more complete turning was still needed, upon which God promises a still nearer presence, as Malachi repeats the words (Malachi 3:7), and James exhorts, Draw nigh to God and He will draw nigh to you (James 4:8).

Those who have turned to God continually need to turn more into the center of the narrow way. As the soul opens itself more to God, God—whose communication of Himself is always hindered only by our closing the door of our hearts against Him—enters more into it. If a man love Me, he will keep My words, and My Father will love him, and We will come unto him, and We will make Our abode with him (John 14:23).

Osorius: “People are said to be converted when, leaving behind them deceitful goods, they give their whole mind to God, bestowing no less effort and zeal on divine things than before on the nothings of life.”

Council of Trent, Session VI, Chapter 5: “When it is said in Holy Scripture, Turn unto Me and I will turn unto you, we are admonished as to our own freedom; when we answer, Turn us, Lord, unto Thee, and we shall be turned, we confess that we are preceded by the grace of God.”