Galatians is Paul's fierce defense of justification by faith alone against teachers who would add the Law to the gospel. He argues that the Cross plus anything is no gospel — and that the freedom of the sons of God is not a license to sin but a Spirit-led life of love.
“I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God.”
“But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith.”
“And let us not be weary in well doing: for in due season we shall reap, if we faint not.”