הֵ֤ן יַעֲשֹׁ֣ק נָ֭הָר לֹ֣א יַחְפּ֑וֹז יִבְטַ֓ח ׀ כִּֽי־יָגִ֖יחַ יַרְדֵּ֣ן אֶל־פִּֽיהוּ׃
Behold, if a river overflow, he trembleth not; He is confident, though the Jordan rush forth to his mouth.
Read kabbalistic (mystical) interpretation of Job 40:23: and classical mystical sources.