 He was later introduced to Alfonso de Cartagena, the Bishop of Burgos (1435–1456), who was impressed by the bright, high-spirited boy.Cartagena had him educated at his own residence, gave him several prebends, ordained him a priest in the year 1445, and made him a canon at the Cathedral of Burgos.Possessing all of these offices simultaneously caused González many qualms of conscience, as it was contrary to Church law.