Tehillim 119:19
גֵּר אָנֹכִי בָאָרֶץ אַל-תַּסְתֵּר מִמֶּנִּי מִצְוֹתֶיךָ
ger anochi vaaretz al-taster mimeni mitzvoteicha
I am a stranger on the earth; do not hide Your commandments from me.
"I am a stranger on the earth" and my days are few, so "do not hide Your commandments from me." Let them not stay hidden so that I may implement them. If I fail to keep them now, when shall I keep them?
"I am a stranger on the earth," and do not know the day of my departure. So, "do not hide Your commandments from me." I am like a passing stranger who requires that provisions for the road be at hand in case he must depart suddenly.
King David felt that since a man's stay in this world is only temporary, he must equip himself with Torah learning and the observance of mitzvot.
The story is told about a certain province in India where the inhabitants would elect a king to rule over them for one year. Once, they crowned a fool who was unaware of this time limitation to his reign, and he built palaces for himself. At the conclusion of his year-long reign, he was separated from all his wealth. He was succeeded to the throne by a sage, who soon found out that his reign would last only a year. He then invested much effort to amass a great deal of money, which he deposited in another country. At the end of the year he had everything, and he rejoiced in both places.
"I am a stranger "גר" (ger) on the earth." The Midrash says, "Was, then, David a stranger? He said, rather, just as one who today becomes a convert (ger) is ignorant of Torah, so a man's eyes are open and yet he may be unable to distinguish between his right hand and his left hand in Torah knowledge. If David, who composed all these songs and psalms, said, 'I am a stranger on the earth' and know nothing, it is assuredly true of us that we know nothing!"
We are both strangers and settlers (cf. v. 39:13), like all our forefathers (cf. Bereishit 23:4). "For our days on earth are a shadow" (Iyov 8:9). Just as this shadow passes, so the human being passes away. However, our days are like a shadow only when we do not study and apply the Torah.
Thus our Sages teach, "The day is short, the work is abundant, and the workers are lazy; the reward is ample and the master urges."
Accordingly, it says, "I am a stranger on the earth; do not hide Your commandments from me."
I ask, "Open my eyes, that I may behold wondrous things from Your Torah" (v119:18). Profound secrets are not revealed to those not sufficiently deserving, but I am a stranger here on earth. My soul is carved from on high.
"I am a stranger on the earth; do not hide Your commandments from me." King David is telling us that his entire existence in this world is like that of an alien in a strange land. He is here only for one purpose: to collect Torah and mitzvot to bring to the World to Come. Therefore he beseeches Hashem: "Do not hide Your mitzvot from me." Indeed, every Jew should try to emulate the behavior of King David. A person should strive to make Torah his primary occupation.
The Chofetz Chaim related an excellent parable to illustrate this idea:
Tehillim 119:1 - Tehillim 119:2 - Tehillim 119:3 - Tehillim 119:4 - Tehillim 119:5 - Tehillim 119:6 - Tehillim 119:7 - Tehillim 119:8 - Tehillim 119:9 - Tehillim 119:10 - Tehillim 119:11 - Tehillim 119:12 - Tehillim 119:13 - Tehillim 119:14 - Tehillim 119:15 - Tehillim 119:16 - Tehillim 119:17 - Tehillim 119:18