Luke 10:17 - Matthew Poole's English Annotations on the Holy Bible

As we before read of the twelve coming back to give Christ an account of their success, so we here have the same of the seventy. Whether this joy of the seventy was more carnal than it ought, they rather rejoicing in that new power which they had received from Christ, than in the demonstration of Christ's Divine power, and the confirmation of the doctrine of the gospel by these miraculous operations, is hard to determine; for though Christ's reply seemeth to have a check in it, yet it is so qualified by the term rather, Luke 10:20, that we cannot from thence absolutely conclude any such thing from it. Here is a difference to be observed between Christ's and his disciples casting out of devils. Christ did it in his own name, by his own word of command, power, and authority; the disciples did it in Christ's name, and by a power and authority derived from him.