מֵ֭פֵר מַחְשְׁב֣וֹת עֲרוּמִ֑ים וְֽלֹא־תַעֲשֶׂ֥ינָה יְ֝דֵיהֶ֗ם תּוּשִׁיָּֽה׃
He frustrateth the devices of the crafty, So that their hands can perform nothing substantial.
Read kabbalistic (mystical) interpretation of Job 5:12: and classical mystical sources.