If you wish to read the texts click here: Job 42:1-3.5-6.12-17; Lk 10:17-24
Since neither Matthew nor Mark narrates the rending of the seventy-two (10:1-12), they do not have these verses (10:17-24), which narrate the return of the seventy-two from Mission. When the disciples who were filled with joy on their return report to Jesus that even the demons submit to his name, the response of Jesus is to see the fall of Satan and of his power, and to thank the Father for his graciousness.
Since the disciples here confirm that the demons are cast out in the name of Jesus, it follows that Satan’s rule is indeed coming to an end with the coming of Jesus and the giving of his authority to his disciples. However, as far as the disciples are concerned what is more important that Satan submitting to them is the fact that their names are now recorded in the book of life.
The thanksgiving to the Father is found also in Matthew 11:25-27 and is because God has favoured not the wise and intelligent but the unlearned and revealed to them the mysteries of the kingdom.
The last two verses in which Jesus speaks of the blessedness of the disciples (10:23-24) are found also in Matthew 16:16-17. The disciples are indeed in a privileged position because they have been able to see and experience what prophets and kings have not been privileged to see, namely the mighty works of Jesus, which resulted in the fall of Satan and his kingdom.
The results of our actions ought not to concern us as much as doing the action to the best of our ability. If we are clear that it is God’s kingdom that we are called to work towards and that he is the one who is finally in control, we will be able to focus on what we have to do and not bother about what will happen later.