כִּ֤י כִגְבֹ֣הַּ שָׁ֭מַיִם עַל־הָאָ֑רֶץ גָּבַ֥ר חַ֝סְדּ֗וֹ עַל־יְרֵאָֽיו׃
For as the heaven is high above the earth, So great is His mercy toward them that fear Him.
Read kabbalistic (mystical) interpretation of Psalms 103:11: and classical mystical sources.