John Calvin Commentary Psalms 119:96

"I have seen an end of all perfection; [But] thy commandment is exceeding broad." — Psalms 119:96 (ASV)

In all perfection, I have seen the end. The prophet again, using other words, affirms the same truth that he had taught in the first verse of this section—that the word of God is not subject to change, because it is elevated far above the perishable elements of this world.

He asserts here that there is nothing under heaven so perfect and stable, or so complete in all respects, as not to have an end; and that the Divine word alone possesses such vastness as to surpass all bounds and limits.

Since the verb כלה kalah, signifies to consume and finish, as well as to make perfect, some interpret the noun תכלה tichelah, as measure or end. However, it is necessary to translate it as perfection, so that the comparison may be more apparent and to better amplify the faithfulness of the Divine word. The idea the prophet intended to convey is that after he had considered all things, especially those distinguished by the greatest perfection, he found that they were nothing when compared with God’s word. This is because all other things will soon come to an end, while the word of God always stands firm in its own eternity.

Thus, it follows that we have no ground for fearing that God's word will forsake us in the midst of our course.

It is termed broad, meaning that even if a person were to ascend above the heavens, descend into the lowest depths, or traverse the whole space from one side to the other, they will not reach further than where the truth of God leads us.

It remains, then, for our minds to embrace this vast extent; and this will be the case when they have ceased to confine themselves within the narrow limits of this world.