Daniel 10:11 Kabbalah

וַיֹּ֣אמֶר אֵלַ֡י דָּנִיֵּ֣אל אִישׁ־חֲ֠מֻדוֹת הָבֵ֨ן בַּדְּבָרִ֜ים אֲשֶׁר֩ אָנֹכִ֨י דֹבֵ֤ר אֵלֶ֙יךָ֙ וַעֲמֹ֣ד עַל־עָמְדֶ֔ךָ כִּ֥י עַתָּ֖ה שֻׁלַּ֣חְתִּי אֵלֶ֑יךָ וּבְדַבְּר֥וֹ עִמִּ֛י אֶת־הַדָּבָ֥ר הַזֶּ֖ה עָמַ֥דְתִּי מַרְעִֽיד׃

And he said unto me: ‘O Daniel, thou man greatly beloved, give heed unto the words that I speak unto thee, and stand upright; for now am I sent unto thee’; and when he had spoken this word unto me, I stood trembling.

Read kabbalistic (mystical) interpretation of Daniel 10:11: and classical mystical sources.