Which holdeth our soul in life, and suffereth not our feet to be moved. Which holdeth our soul in life - Literally, "he who placeth our soul בחיים bachaiyim, in lives." We are preserved alive, have health of body, and feel the life of God in our hearts.
And suffereth not her feet to be moved - Keeps us steadfast in his testimonies. We have our life, our liberty, and our religion. O, what hath the Lord wrought for us! "Make, therefore, the voice of his praise to be heard." Let God and man know you are thankful.