When I went back to this parable, I had to chuckle. At last, a
Rock that got my attention.
48 They are like a man building a house. He digs deep and builds his house on rock. The floods come, and the water crashes against the house. But the flood cannot move the house, because it was built well.
49 “But the people who hear my words and do not obey are like a man who builds a house without preparing a foundation. When the floods come, the house falls down easily and is completely destroyed.”
Luke 6:48-49 ERV
And He didn't pull any punches with this lesson. Please note: Jesus didn't say there wouldn't be hard times for those who believe in Him. He said they would "not fall because (they were) built on rock." Nothing else will withstand the winds and storms of life.
Jesus isn't surprised. He knows life can be hard and unexpected, and promises to never leave us. Jesus is the only rock that can weather the storms, and not be changed by them.