Isaiah 38:22 Kabbalah

וַיֹּ֥אמֶר חִזְקִיָּ֖הוּ מָ֣ה א֑וֹת כִּ֥י אֶעֱלֶ֖ה בֵּ֥ית יְהוָֽה׃ (ס)

And Hezekiah said. 'What is the sign that I shall go up to the house of the LORD?’

Read kabbalistic (mystical) interpretation of Isaiah 38:22: and classical mystical sources.