Innocence and peace are the two most intimate features of heaven. They are so called because they emanate directly from the Lord; for He is innocence itself and peace itself. It is because of innocence the Lord is called the Lamb, and He says of peace:

Peace I leave to you, my peace I give to you. John 14:27.

The same is meant by the peace they were to give as a greeting to a town or a house on entering it; and if it was worthy, peace would come upon it, but if not, their peace would return to them (Matt. 10:11-15). This too is why the Lord is called 'the Prince of Peace' (Is. 9:6, 7).

A further reason why innocence and peace are the most intimate features of heaven is that innocence is the being of every good thing, and peace is the blessedness of every pleasure which belongs to good. (See my book HEAVEN AND HELL, on the state of innocence of the angels in heaven, 276-283; and on the state of peace in heaven, 284-290.)