"The fruit that is reaped by the baptism of infants, as well as by the instruction of children and others, is quite incredible. These children, I trust heartily, by the grace of God, will be much better than their fathers. They show«,n ardent love for the Divine law, and an extraordinary zeal for learning our holy religion and imparting it to others. Their hatred for idolatry is marvellous. They get into feuds with the heathen about it, and whenever their own parents practise it, they reproach them and come off to tell me at once. Whenever I hear of any act of idolatrous worship, I go to the place with a large band of these children, who very soon load the devil with a greater amount"
January 1, 1970
https://en.wikiquote.org/wiki/Francis_Xavier