A.B. Simpson emphasizes the transformative power of the Holy Spirit in believers' lives, as stated in Jeremiah 32:40. He highlights the struggle of relying on one's own strength and the need for divine assistance to overcome sin and self. Simpson encourages listeners to seek the presence of God within them, offering rest and empowerment through the Holy Spirit. He reassures that true power comes not from oneself but from the Holy Spirit, which is sufficient for all challenges. The sermon calls for a deep reliance on God's Spirit to lead and guide us in our spiritual journey.

I will put my spirit within you, and cause you to walk in my statutes, and ye shall keep my judgments. I will put my fear in [your] hearts, that [you] shall not depart from me (Jeremiah 32:40). Would you not find that a blessed rest when you are worn out from struggling in your own strength? Do you not feel the need of an invincible man to conquer the strong man of self and sin? Do you want a leader? Do you want God Himself to be with you, to be within you? Do you want rest? Are you conscious of this need? Are you weary of this sense of being beaten back, of longing, wanting but not accomplishing? That is what He comes to do. Ye shall receive power, after that the Holy Ghost is come upon you (Acts 1:8). Better than that, "Ye shall receive the power of the Holy Spirit coming upon you. 11 That is the true version, and is immensely different from the other. You shall not receive power yourself, so that people will say, "How much power that man has!" You shall not have any power whatever, but you shall receive the power of the Holy Ghost coming upon you. The power is His!-and it is sufficient.