118. For this reason it happens that, if only a man's ruling affection is known, then, when he is saying or doing anything, another recognizes from what purpose and from what love, as it were from what fountain, it springs. The Lord says that an evil tree bringeth forth evil fruit, and a good tree good fruit, and that an evil tree cannot bring forth good fruit.* * Matt. vii. 17, 18; Luke vi. 43.