כַּחֲל֥וֹם מֵהָקִ֑יץ אֲ֝דֹנָי בָּעִ֤יר ׀ צַלְמָ֬ם תִּבְזֶֽה׃
As a dream when one awaketh, So, O Lord, when Thou arousest Thyself, Thou wilt despise their semblance.
Read kabbalistic (mystical) interpretation of Psalms 73:20: and classical mystical sources.