It is a sin directly against one's neighbour, since one man cannot over-abound in external riches, without another man lacking them.
Thomas AquinasEternity is called whole, not because it has parts, but because it is lacking in nothing.
Thomas AquinasIn order for a war to be just, three things are necessary. First, the authority of the sovereign... Secondly, a just cause... Thirdly... a rightful intention.
Thomas Aquinas