7:15-20
There will be false prophets, they will be dressed in sheep’s clothing, adopting a sort of pseudo- Christianity. The give away will be the fruit of their lives, such people cannot produce anything good, we should not listen to such people. The fruit of someone's life, not their words, are a true test.
7:21-23
Saying the right words is not enough. Some may also claim to have prophesied in Christ’s name, and cast out demons, but doing the will of the Father is what counts. Note that casting out demons or prophesying does not in itself prove anything. Indeed Jesus calls these people “evildoers”!
7:24-29
Jesus then backs up his message with the parable of the wise and foolish builders. Note that obeying the Father and obeying Jesus are put on an equal footing. We are wise if we put Jesus’ words into practice. We are building on solid ground if we follow Jesus. Otherwise we are building on sands. Either way storms will come, the question is whether or not we will survive.