Matthew 7:25

“And the rain descended, and the floods came,

And the winds blew, and beat on (‘fell on') that house,”

Being on a sound foundation was no guarantee that trials and tribulations would not come, for come they would (Matthew 5:11). Everything would be thrown at them,  apart from the smiting of God  (Matthew 7:27). Outwardly they would appear to have to face the same things as the foolish. But the difference was that while they might be ‘beaten on' and have to face trials (compare Romans 5:3; Hebrews 12:3; James 1:2) they would not be ‘smitten'.

Matthew 7:25 b

“And it fell not,”

The house had to face the same drenching rain, the same powerful floods, the same strong winds, as the other. (They might even have been built side by side). But it stood firm. It did not fall.

Matthew 7:25 c

“For it was founded on the rock.”

And the reason that it did not fall was that it was founded on the rock. It had a firm foundation. And that firm foundation was response to and obedience to the words of Jesus. They had repented, they had received forgiveness, they had entered under the Kingly Rule of Heaven, and they thus obeyed His words. This was their rock. Their loving and obedient relationship to Jesus.