Let us beware in ourselves, my beloved, and realize that even if Gehenna is subject to a limit, the taste of its experience is most terrible, and the extent of its bounds escapes our very understanding. Let us strive all the more to partake of the taste of God's love for the sake of perpetual reflection on Him, and let us not (have) experience of Gehenna through neglect.
What is a charitable heart? It is a heart which is burning with love for the whole creation, for men, for the birds, for the beasts … for all creatures. He who has such a heart cannot see or call to mind a creature without his eyes being filled with tears by reason of the immense compassion which seizes his heart; a heart which is softened and can no longer bear to see or learn from others of any suffering, even the smallest pain being inflicted upon a creature. That is why such a man never ceases to pray for the animals … [He is] … moved by the infinite pity which reigns in the hearts of those who are becoming united with God.
No part belonging to any single one of (all) rational beings will be lost, as far as God is concerned, in the preparation of that supernal Kingdom which is prepared for all worlds. Because of that goodness of His nature by which He brought the universe into being (and then) bears, guides and provides for the worlds and (all) created things in His immeasurable compassion, He has devised the establishment of the Kingdom of heaven for the entire community of rational beings — even though an intervening time is reserved for the general raising (of all) to the same level.