Jesus did not merely maintain a state of innocence, avoiding all sin. Instead, Christ achieved a life of perfect obedience, fulfilling all righteousness.

Matthew 3:13-17 Right Response Staff
Jesus did not merely maintain a state of innocence, avoiding all sin. Instead, Christ achieved a life of perfect obedience, fulfilling all righteousness.
Let us tremble at knowing that nothing escapes the eyes of our Holy God. Every word shall be weighed. And yet, for those who are in Christ, this judgment is not unto condemnation but unto reward, for Christ has borne our guilt, even for every idle word. But for the unrepentant, the tongue that now accuses others shall, on that …
Jesus is not merely addressing the need for a superior “positional” righteousness (justification). He is also speaking to the need for a superior “progressive” righteousness (sanctification). In other words, Jesus is not saying, “The Pharisees have a meticulous outward righteousness, but inwardly, their hearts remain corrupted. Therefore, you merely need to receive the superior inward righteousness of Christ by faith.” …
If a man should lose his saltiness, he is only good to be thrown out and trampled by men. Yet, even this has its divinely gracious purpose. When the roads and walkways are slick from snow and ice, we may throw out salt so that pedestrians do not trip and fall.
“So many were the corruptions that had crept into this duty of prayer among the Jews, that Christ saw it needful to give a new directory for prayer, to show his disciples what must ordinarily be the matter and method of their prayer, which he gives in words that may very well be used as a form; as the summary …
If anything, the religious rulers of Jesus’ day were Antinomians, not Legalists. They did not “stretch” the Law of God, they “shrunk” it.