O Nebuchadnezzar. — They mention the king by name, so as to make their address correspond with his (Daniel 3:14). His attention would in this way be directed to the strong antithesis between his statement (Daniel 3:15) and theirs (Daniel 3:17). Great though the distinction was between king and subject in such a country as Babylon, yet that distinction was lost when any collision occurred between duty to Jehovah and obedience to a royal edict.
We are not careful. — More correctly, as translated by Theodotion, We have no need — i.e., it is needless for us to give any reply.