When one speaks about "serving G-d with truth," this does not imply - as some erroneously think - that one must pulverize mountains and shatter boulders, or turn the world upside down. The absolute truth is that any act performed in the service of G-d, whatever it may be, is perfectly satisfactory when executed with a sincere intent: a berachah (blessing) pronounced with heartfelt intention; a word of prayer expressed with a prepared heart and an awareness of "before Whom you stand"; a passage in the Torah said with the understanding that it is the word of G-d; a verse of Tehillim; a beneficent character trait expressed in befriending another with affection and love.

HaYom Yom, entry for 2 Adar I