“God is not a man, that He should lie” (Numbers 23:19). God’s Word is truth. To build on the foundation of God’s Word is to build on a rock-solid foundation (Luke 6:47-48). To build on this rock-solid foundation is to be safe in the stronghold of God’s salvation: “The salvation of the righteous comes from the Lord; He is their stronghold in time of trouble. The Lord helps them and delivers them; He delivers them from the wicked and saves them, because they take refuge in Him” (Psalm 37:39-40).