יֹֽשֶׁר־לִבִּ֥י אֲמָרָ֑י וְדַ֥עַת שְׂ֝פָתַ֗י בָּר֥וּר מִלֵּֽלוּ׃
My words shall utter the uprightness of my heart; And that which my lips know they shall speak sincerely.
Read kabbalistic (mystical) interpretation of Job 33:3: and classical mystical sources.