Zechariah 2:4-5 And said unto him, Run, speak to this young man, saying Jerusalem shall be inhabited as towns without walls for the multitude of men and cattle therein, for I, saith the Lord, will be unto her a wall of fire round about, and will be the glory in the midst of her. ~ Increase comes when the presence and glory of God comes. Part of the Hebrew definition for glory is wealth and riches. Throughout the OT we see that where the ark of the covenant was, increase and blessing was. This is nothing that Israel had to strive after or pursue; it was a ‘natural effect’ of the presence of God.