John Trapp on Isaiah 45:18

Ver. 18. He created it not in vain] Therefore never think that he will forſake it, or not take care of his Church therein, for whoſe ſake he made it at firſt and ſtill upholdeth it by the word of his power, 1 Cor. 3.22, 23. Now if God created not the earth in vain, much leſs the heavens (wherein he hath ſhewed his greater skill, Heb. 11.10. See the Note there) but that his people might there inhabit for ever. And here it is that they ſhall be ſaved in the Lord with an everlaſting ſalvation: Yea they ſhall not be aſhamed or confounded world without end. ver. 17.