To build something generally means to put together a variety of simpler pieces to make a useful and more complex structure, as to build a house out of wood or bricks, and it is commonly used this way in the Word. In the land of Shinar men wished to build a tower, and in the new testament Jesus advised that a wise man should build his house on a rock. But in a representative sense the meaning is to build a mental and spiritual structure, like the doctrine of a church or the individual concepts of spiritual reality in a single mind. The building materials are representative also. The tower of Babel was built of brick, which is man-made rock, or representatively, man-made "truths", that is"truths" not from God but ideas of spiritual reality thought out by men. The house that the wise man would build was founded on a natural or "God-made" rock, which means a truth from the Word.

600. 13:14 And to lead astray those who dwell on the earth, because of the signs which it was granted to do in the presence of the beast. This symbolically means that through their testifications and assertions the clergy lead people in the church into errors.

To lead astray means, symbolically, to lead into errors. Those who dwell on the earth symbolize people in the Protestant Reformed Church, as in nos. 578, 588, 597 above. The signs which the second beast was granted to do in the presence of the first beast symbolize testifications and assertions (nos. 598, 599). The beast from the sea, before whom the signs were done, symbolizes the faith of the dragon among the laity (no. 567); and the beast coming up out of the earth that did the signs, which is elsewhere called a false prophet, symbolizes the faith of the dragon among the clergy (no. 594).

The Lord says something akin to this in Matthew 24:24-26.