If God is so powerful why did he let Satan go?

One answer

God gives all the freedom of choice - including Satan.

Another answer

If there is no Bad Guy, then what's the value of a Good Guy?

Another answer

In the first instance when Satan rebelled, we may never know the answer, as this has not been revealed. However it is only true for a time as His doom is sealed as Hell has been prepared for the Devil and his angels, where he will remain, once finally sent there.


Satan was not let go, he and 1/3 of the angels who rebelled against God were cast out of Heaven.

His final doom in the lake of fire is promised by God and God cannot lie.