The word for “faithfulness” in Galatians 5:22 means to “win over” or “to persuade.” Faith, or faithfulness, as produced by the Holy Spirit, is a firm persuasion and conviction. It is a belief and confidence in the person of God and His revealed Word such that it brings forth holiness, obedience, and good works. Contrary to faithfulness are unbelief, disobedience, and ungodliness.
FAITHFULNESS in the heart says things such as: "I want to obey God even if it is difficult." "I believe and trust in God even if I don't understand my situation." "I want to be diligent in all things."