All those years of work could be going right down the tubes if someone gets convicted and converted. Right out of *The Screwtape Letters*.
>>All those years of work could be going right down the tubes if someone gets convicted and converted. Right out of *The Screwtape Letters*.<<
You're assuming that Satan holds some sort of power other than simply the ability to tempt us. God is sovereign over his entire creation, and that includes Satan. Satan does nothing outside of God's perfect will.
Rejoice in the fact that we fight a vanquished enemy!