10:18 This is the third instance in this chapter of Daniel receiving strength from an angel who touched him (vv. 10, 16; cf. Heb. 1:14).400This human-appearing angel was probably the same one who touched Daniel's lips (v. 16), but he is perhaps different from the angel who had helped him to his feet (v. 10).
10:19 The angel repeated the complementary description "man of high esteem"(cf. v. 11; 9:23), which reassured Daniel. He also encouraged him not to fear, to feel at peace, to take courage, and to be courageous (v. 19; cf. Josh. 1:9). These words strengthened the aged prophet (cf. 2 Cor. 12:7-10), and he encouraged the angel to give him the rest of the revelation.
The total effect of these many verses that dwell on Daniel's felt weakness and the strength that an angel or angels provided him is to make the reader anticipate the following revelation. It was very important.
"This vision [in 11:2-12:4] contains the most detailed prophetic revelation in the Book of Daniel."401