Matthew 7:24-29

Build on the Rock.
For parallel see Lk 6:47-49.
v.24 The person who listens to Jesus's teaching and follows it is wise; like a man who builds his house on solid rock. It is not enough to simply hear his words, rather we must persevere in obedience. See also Jas 1:22-25.
v.25 When the trials of life (rains, floods, winds) come his house does not fall because it is built on the rock. Judgment day will come like a flood exposing authentic Christian faith (and the fool).
v.26 The person who hears Jesus's words and does not do them is foolish like a man who builds his house on the sand. The words of the Sermon on the Mount are mean to be obeyed.
v.27 When the trials of life (rains, floods, winds) come his house falls (with a great crash) because it is built on the sand. The reality of eternal punishment should sober us all!
v.28-29 The crowds were astonished at Jesus's teaching because he taught with great authority (unlike their religious leaders). This ends the first of five discourses in Matthew.

Read Matthew 7:24-29