In the Gospel from the Mass (Matt 5:17-19) from today, Jesus reminds the world of the great precision of His word across Salvation History:

[17] “Think not that I have come to abolish the law and the prophets; I have come not to abolish them but to fulfil them. [18] For truly, I say to you, till heaven and earth pass away, not an iota, not a dot, will pass from the law until all is accomplished.  [19] Whoever then relaxes one of the least of these commandments and teaches men so, shall be called least in the kingdom of heaven; but he who does them and teaches them shall be called great in the kingdom of heaven.

Jesus reveals the strong emphasis that He places on the keeping the Law:

This should cause some nervousness; Jesus is suggesting that not only does the Law matter, but that He is telling us to keep the Law with incredible precision.

Luckily, Jesus has promised us the outpouring of the Holy Spirit to help us.  And given that we ought to be paying attention to ‘iotas’ and ‘dots’, we need all the help we can get.