“It’s impossible to keep the Law of Moses”

In the 21st century and every century since 70 AD when the Romans destroyed the Jerusalem Temple—yes, since sacrificing at the Temple is a large part of the Law Moses gave (from God) to the Hebrews. However, to say that it was always impossible is to overlook a number of passages in the New Testament:

Elizabeth and her husband Zechariah (the parents of John the Baptizer) were upright, “observing all the Lord's commandments and regulations blamelessly”. (Luke 1:6)

The “rich young ruler” said he had kept all the commandments since his youth. (Mark 10:17-23)

Paul said that he, himself, had been blameless in regard to the Law. (Philippians 3:5, 6)

But those who followed Jesus learned “a new and better way” in the New Covenant of following Jesus’ teachings and coming under his atoning grace.