'Base' in the Bible

He is like a man building a house, who went deep and put the base of it on a rock; and when the water came up and the river was driving against that house, it was not moved, because the building was good.

But he who gives hearing, without doing, is like a man building a house on the earth without a base for it; and when the force of the river came against it, straight away it came down; and the destruction of that house was great.