Someone who knows enough to become the owner of a tree, and gives thanks to you for the benefits it brings him, is in a better state, even if ignoran… - Augustine of Hippo

Since God is the highest good, he would not allow any evil to exist in his works unless his omnipotence and goodness were such as to bring good even out of evil.

It is this Good which we are commanded to love with our whole heart, with our whole mind, and with all our strength. It is toward this Good that we should be led by those who love us, and toward this Good we should lead those whom we love. In this way, we fulfill the commandments on which depend the whole Law and the Prophets: 'Thou shalt love the Lord Thy God with thy whole heart, and thy whole soul, and with thy whole mind'; and 'Thou shalt love thy neighbor as thyself.' For, in order that a man might learn how to love himself, a standard was set to regulate all his actions on which his happiness depends. For, to love one's own self is nothing but to wish to be happy, and the standard is union with God. When, therefore, a person who knows how to love himself is bidden to love his neighbor as himself, is he not, in effect, commanded to persuade others, as far as he can, to love God?

O sons of Peace, sons of the One Catholic [Church], walk in your way, and sing as you walk. Travelers do this in order to keep up their spirits.