288. Because the peace of heaven is the Divine inmostly affecting with blessedness the veriest good in angels, it can be clearly perceived by them only in the delight of their hearts when they are in the good of their life, in the pleasure with which they hear truth that agrees with their good, and in gladness of mind when they perceive the conjunction of good and truth. From this it flows into all the acts and thoughts of their life, and there presents itself as joy, even in outward appearance.  But peace in the heavens differs in quality and quantity in agreement with the innocence of those who are there; since innocence and peace walk hand in hand; for every good of heaven, as said above, is from innocence, and every delight of that good is from peace. Evidently, then, the same that has been said in the foregoing chapter about the state of innocence in the heavens may be said here of the state of peace there, since innocence and peace are conjoined like good and its delight; for good is felt in its delight, and delight is known from its good. This being so, it is evident that angels of the inmost or third heaven are in the third or inmost degree of peace, because they are in the third or inmost degree of innocence; and that angels of the lower heavens are in a less degree of peace, because they are in a less degree of innocence (see above n. 280).  That innocence and peace go together like good and its delight can be seen in little children, who are in peace because they are in innocence, and because they are in peace are in their whole nature full of play. Yet the peace of little children is external peace; while internal peace, like internal innocence, is possible only in wisdom, and for this reason only in the conjunction of good and truth, since wisdom is from that conjunction. Heavenly or angelic peace is also possible in men who are in wisdom from the conjunction of good and truth, and who in consequence have a sense of content in God; nevertheless, while they live in the world this peace lies hidden in their interiors, but it is revealed when they leave the body and enter heaven, for their interiors are then opened.