כִּֽי־חַ֭סְדְּךָ גָּד֣וֹל עָלָ֑י וְהִצַּ֥לְתָּ נַ֝פְשִׁ֗י מִשְּׁא֥וֹל תַּחְתִּיָּֽה׃
For great is Thy mercy toward me; And Thou hast delivered my soul from the lowest nether-world.
Read kabbalistic (mystical) interpretation of Psalms 86:13: and classical mystical sources.