ל֥וּא הִקְשַׁ֖בְתָּ לְמִצְוֺתָ֑י וַיְהִ֤י כַנָּהָר֙ שְׁלוֹמֶ֔ךָ וְצִדְקָתְךָ֖ כְּגַלֵּ֥י הַיָּֽם׃
Oh that thou wouldest hearken to My commandments! Then would thy peace be as a river, And thy righteousness as the waves of the sea;
Read Jewish philosophy on Isaiah 48:18: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.