“And hereby we do know that we know him, if we keep his commandments. He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.” 1 John 2:3-4
If one is a Christian — if he is truly sorry for his sins and looks in faith to Christ Jesus and His cross for pardon and forgiveness — he will then seek to keep Jesus’ commandments and live in accordance with God’s Word. One who claims to know Jesus Christ and trust in Him but disregards His commandments is a liar and not a true believer.
Grant that I truly repent of my sins and look to you in faith, Lord Jesus, that I may have forgiveness for all my sins and walk in accord with Your Word. Amen.
[Scripture is quoted from the King James Version of the Bible.]