Charles Spurgeon Commentary Luke 10:18-20

"And he said unto them, I beheld Satan fallen as lightning from heaven. Behold, I have given you authority to tread upon serpents and scorpions, and over all the power of the enemy: and nothing shall in any wise hurt you. Nevertheless in this rejoice not, that the spirits are subject unto you; but rejoice that your names are written in heaven." — Luke 10:18-20 (ASV)

That is a higher privilege than to be master over demons, or to be able to tread on serpents. That day of miracles is past; but the power of the gospel is a spiritual power the same as before. We still cast out devils; still are men delivered from the dominion of Satan.