Build on the Rock
In the end, we will not be judged based our faith, but based our actions. Our faith and actions work together.
What good is it, to say we have faith but have no works? Can that faith help another or even save ourselves?
Such a faith has no merit in reality and is delusional; but a faith that lives and moves and has it's being in reality, such faith is good and can save.
We build our house upon the rock, which is obedience: how can we stand when calamity comes if we don't obey when things are good?
Jesus Christ is the Rock. We believe in Him and follow after Him: He is the Example and He is the Way.
Therefore, we build on the Rock.