In returning and rest... — The words describe a process of conversion, but the nature of that conversion is determined by the context. In this case it was the turning from the trust in man, with all its restless excitement, to a trust in God, full of calmness and of peace.
Related Commentaries of Isaiah 30:15
Isaiah 30:15
15 For thus saith the Lord GOD, the Holy One of Israel; In returning and rest shall ye be saved; in quietness and in confidence shall be your strength: and ye would not.