Not everyone rests on Jesus' laurels but follow the commandments. For didn't Jesus say:
Matthew 7:21-23
“Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but the one who does the will of my Father who is in heaven. On that day many will say to me, ‘Lord, Lord, did we not prophesy in your name, and cast out demons in your name, and do many mighty works in your name?’ And then will I declare to them, ‘I never knew you; depart from me, you workers of lawlessness.’
So, because I
believe in Jesus I follow what He says. And Jesus says to follow the will of his Father in Heaven. And His father said to keep the 7th day holy.
If I believe in exercise I go to the gym, I don't sit around all day. If I believe in vegetarianism I don't eat meat, I follow what vegetarianism means. If I believe in Jesus I do what Jesus says. How can you say you believe in Jesus if you don't follow His commandments? And isn't that how we are saved? By believing in Jesus? Even the demons
believe, but they don't
believe in. Read what James 2 is actually saying:
James 2
19 Thou believest that there is one God; thou doest well: the devils also believe, and tremble.
20 But wilt thou know, O vain man, that faith without works is dead?
21 Was not Abraham our father justified by works, when he had offered Isaac his son upon the altar?
22 Seest thou how faith wrought with his works, and by works was faith made perfect?
23 And the scripture was fulfilled which saith, Abraham believed God, and it was imputed unto him for righteousness: and he was called the Friend of God.
24 Ye see then how that by works a man is justified, and not by faith only.
25 Likewise also was not Rahab the harlot justified by works, when she had received the messengers, and had sent
them out another way?
26 For as the body without the spirit is dead, so faith without works is dead also.