Isaiah 42:21 says “The LORD is well pleased for his righteousness' sake; he will magnify the law, and make it honourable.” In the remainder of Matthew chapter five we see how Jesus has indeed magnified the law. We note the following; Matthew 5:19 from not only obeying the law but teaching it also, 5:21-22 from do not kill to not being angry with your brother without cause, 5:27-28 from do not commit adultery to being guilty if you look at a woman lustfully, 5:31 from divorcing by a letter to any man who divorces his wife except for sexual immorality, causes her or anyone who marries a divorced woman to commit adultery, 5:33-37 from not breaking oaths made to the Lord to do not swear at all, either by heaven or earth or by Jerusalem. And do not swear by your head, let your Yes be Yes, and your No, No, 5:38-42 from an eye for an eye and tooth for a tooth to turning the other cheek and if someone sues you for your coat, give them your cloak also, 5:43-45 from love your neighbour and hate your enemy to love your enemies and bless them that curse you and pray for those that are spiteful and use you. Does it sound like Jesus is destroying the law? Certainly not!
Dr Charles W Zamzow Jr, Paperback Volume 1 edition, ISBN 10: 1492245054, ISBN 13: 9781492245056