וְהַיְלָדִ֤ים הָאֵ֙לֶּה֙ אַרְבַּעְתָּ֔ם נָתַ֨ן לָהֶ֧ם הָֽאֱלֹהִ֛ים מַדָּ֥ע וְהַשְׂכֵּ֖ל בְּכָל־סֵ֣פֶר וְחָכְמָ֑ה וְדָנִיֵּ֣אל הֵבִ֔ין בְּכָל־חָז֖וֹן וַחֲלֹמֽוֹת׃
Now as for these four youths, God gave them knowledge and skill in all learning and wisdom; and Daniel had understanding in all visions and dreams.
Read Kabbalistic (mystical) interpretations of Daniel 1:17: Zohar and classical Jewish mystical sources, free online.