Ambrose of Milan

Now Luke mentions only four blessings, but Matthew eight; but in those eight are contained these four, and in these four those eight. For the one has embraced as it were the four cardinal virtues, the other has revealed in those eight the mystical number. For as the eighth 1 is the accomplishment of our hope, so is the eighth also the completion of the virtues. But each Evangelist has placed the blessings of poverty first, for it is the first in order, and the purest, as it were, of the virtues; for he who has despised the world shall reap an eternal reward. Now can any one obtain the reward of the heavenly kingdom who, overcome by the desires of the world, has no power of escape from them? Hence it follows, He said, Blessed are the poor.