אֶתְכְּרִיַּ֥ת רוּחִ֛י אֲנָ֥ה דָנִיֵּ֖אל בְּג֣וֹא נִדְנֶ֑ה וְחֶזְוֵ֥י רֵאשִׁ֖י יְבַהֲלֻנַּֽנִי׃
As for me Daniel, my spirit was pained in the midst of my body, and the visions of my head affrighted me. .
Read kabbalistic (mystical) interpretation of Daniel 7:15: and classical mystical sources.