יְֽהוָ֗ה מָה־אָ֭דָם וַתֵּדָעֵ֑הוּ בֶּן־אֱ֝נ֗וֹשׁ וַֽתְּחַשְּׁבֵֽהוּ׃
LORD, what is man, that Thou takest knowledge of him? Or the son of man, that Thou makest account of him?
Read kabbalistic (mystical) interpretation of Psalms 144:3: and classical mystical sources.