I keep the Commandments of God because I love Jesus.
Jesus said "If ye Love me, keep My Commandments."
The same reason I am faithful to my wife. Beacause I love her.
If you would realize you keep Gods law because you love Him,, it becomes rather simple.
But,, if you don't love your wife,,I'm sure you would not do the things that show her you lover her. Same with Christ.
Folks that don't want to keep the law,,don't love Jesus... Folks that have affairs on their spouses,, cant say they love their spouses with all their heart. Same with Commandment breakers.