Psalm 27 includes a powerful “single request,” one that is frequently offered as a song:
One thing have I asked of the LORD, that will I seek after:
that I may dwell in the house of the LORD all the days of my life,
to behold the graciousness of the LORD, and to visit early in His temple.
אַחַת, שָׁאַלְתִּי מֵאֵת-יְהוָה– אוֹתָהּ אֲבַקֵּשׁ:
שִׁבְתִּי בְּבֵית-יְהוָה, כָּל-יְמֵי חַיַּי;
לַחֲזוֹת בְּנֹעַם-יְהוָה, וּלְבַקֵּר בְּהֵיכָלוֹ
— Psalms 27:4, JPS 1917, borrowed from Mechon-Mamre
full translation at Mechon-Mamre; others linked here
Two Sources for Basic Commentary
—Rabbi Benjamin Segal offers an analysis of Psalm 27 in its biblical-literary context and discusses the unity of psalm, behind its apparently disparate set of emotions. The very readable series from Schechter Institute in Philadelphia also includes complete text of each psalm in English and Hebrew. This commentary includes a note on the use of Psalm 27 in Elul and the Days of Awe. [UPDATE 2017: Sadly, this on-line resource appears to be gone; Segal’s A New Psalm: The Psalms as Literature is now published by Geffen Books.]
—Machzor Lev Shalem offers explanatory notes as well as a few thoughts on Psalm 27 in the penitential season. Unfortunately, the Rabbinical Assembly’s link to this material, previously offered here, is no longer public. Instead, a few notes are shared in More Exploring Psalm 27 (2 of 4). (Here is the machzor’s own website.) The Kol Nidrei sample pages include Zelda’s poem on “that strange night,” inspiration for this essay during Elul 5772.