Charles Ellicott Commentary Daniel 8:25

"And through his policy he shall cause craft to prosper in his hand; and he shall magnify himself in his heart, and in [their] security shall he destroy many: he shall also stand up against the prince of princes; but he shall be broken without hand." — Daniel 8:25 (ASV)

Through his policy. This is explained more fully in the next two sentences. Through his craft he succeeds, and becomes able to destroy many unexpectedly, and finally raises himself up against God.

Without hand. Not by the hand of man , but by the act of God.