כִּי־ט֣וֹב יְ֭הֹוָה לְעוֹלָ֣ם חַסְדּ֑וֹ וְעַד־דֹּ֥ר וָ֝דֹ֗ר אֱמוּנָתֽוֹ׃
For the LORD is good; His mercy endureth for ever; and His faithfulness unto all generations.
Read kabbalistic (mystical) interpretation of Psalms 100:5: and classical mystical sources.