Grace is good for our souls.
God our Father wants us to grow in grace.
"But grow in grace, and in the knowledge of our Lord and Saviour Jesus Christ. To him be glory both now and for ever. Amen." (2 Peter 3:18)
We grow in grace as we learn more about Jesus:
"Grace and peace be multiplied unto you through the knowledge of God, and of Jesus our Lord." (2 Peter 1: 2)
Grace is the truth of the Gospel, and this truth causes our souls to prosper:
"Beloved, I wish above all things that thou mayest prosper and be in health, even as thy soul prospereth. 3For I rejoiced greatly, when the brethren came and testified of the truth that is in thee, even as thou walkest in the truth. 4I have no greater joy than to hear that my children walk in truth." (3 John 2-4)
The truth is all about the Gospel of Grace:
"I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel:" (Galatians 1: 6)
"That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel: 7Whereof I was made a minister, according to the gift of the grace of God given unto me by the effectual working of his power." (Ephesians 3: 6-7)
"[The Gospel] Which is come unto you, as it is in all the world; and bringeth forth fruit, asit doth also in you, since the day ye heard of it, and knew the grace of God in truth:" (Colossians 1: 6)
Our souls prosper as we rest in the grace of God and allow Him to live in and through us:
"Be not carried about with divers and strange doctrines. For it is a good thing that the heart be established with grace; not with meats, which have not profited them that have been occupied therein." (Hebrews 13: 9)
Let us have grace of our Lord Jesus Christ, and in great measure: good for our souls, and prospering us in every way.