So is it require or optional to follow what Yahshua/Jesus said to do?
1 Yahanan /John 2:3-7, “And by this we know that we know Him, if we guard His commands. The one who says, “I know Him,” and does not guard His commands, is a liar, and the truth is not in him. But whoever guards His Word, truly the love of Yah has been perfected in him. By this we know that we are in Him. The one who says he stays in Him ought himself also to walk, even as He walked. Beloved, I write no fresh command to you, but an old command which you have had from the beginning. The old command is the Word which you heard from the beginning.”
John/Yahanan 12:48, "He who rejects Me, and does not follow My words has One Who judges him. The word that I have spoken, the same will be used to judge him in the last day."