The psalmist, in 119:19, tells us this: “I am only a sojourner in the land.” At first blush, this would mean he is a Gentile (ger ‘anoki) dwelling for awhile in the Land of Israel. On top of this, he says “do not hide your commandments from me.” What to say?
If taken to be a social descriptor, the psalmist is a Gentile who, in spite of his Gentile status, wants to learn and hear the commandments. But, my sources don’t show anyone who thinks this.
That means, since the contextual flow of the whole of Psalm 119 suggests a Jewish author, that “sojourner” is a metaphor for our sojourn on earth. Which, so it seems to me, fits with 119:17: he wants to live long enough to enjoy observing the Torah (after his effort to learn it). And, this also means that the “do not hide” is about the same as “deal kindly” in 119:17.
That’s the process I went through to come to the meaning of the text: in our time on earth we are summoned to join the psalmist of learning Torah and observing Torah. Hence, every weekday we spend time on this blog pondering a passage in the Bible.