תָּעָ֣ה לְבָבִ֔י פַּלָּצ֖וּת בִּֽעֲתָ֑תְנִי אֵ֚ת נֶ֣שֶׁף חִשְׁקִ֔י שָׂ֥ם לִ֖י לַחֲרָדָֽה׃
My heart is bewildered, terror hath overwhelmed me; The twilight that I longed for hath been turned for me into trembling.
Read kabbalistic (mystical) interpretation of Isaiah 21:4: and classical mystical sources.