What is the true teaching of Jesus about the Old Testament Law?

Matthew 5:
“Do not think that I have come to abolish the law or the prophets; I have come not to abolish but to fulfill. 18 For truly I tell you, until heaven and earth pass away, not one letter, not one stroke of a letter, will pass from the law until all is accomplished. 19 Therefore, whoever breaks one of the least of these commandments, and teaches others to do the same, will be called least in the kingdom of heaven; but whoever does them and teaches them will be called great in the kingdom of heaven. 20 For I tell you, unless your righteousness exceeds that of the scribes and Pharisees, you will never enter the kingdom of heaven."

Ephesians 2:15
"He [Jesus] has abolished the law with its commandments and ordinances, that he might create in himself one new humanity in place of the two, thus making peace."

I quote from 'The New Jerome Biblical Commentary' by Raymond E. Brown, page 641. https://www.amazon.co.uk/New-Jerome-B...