And I will make an everlasting covenant with them, that I will not turn away from them, to do them good; but I will put my fear in their hearts, that they shall not depart from me.
I will make an everlasting covenant with them - (Jeremiah 31:31; Jeremiah 31:33; Isaiah 55:3).
They shall not depart from me - never yet fully realized as to the Israelites (Isaiah 30:21). Yahweh compares Himself to a sedulous preceptor following his pupils everywhere to direct their words, gestures, etc.
I will put my fear in their hearts, that they shall not depart from me. Both the conversion and perseverance of the saints are the work of God alone, by the operation of the Holy Spirit.