To read the texts click on the texts: 1 Tim 1:15-17; Lk 6:43-49
In the last part of the Sermon on The Plain, the Lucan Jesus uses the metaphor of a tree and its fruit, and through it exhorts the listeners not merely “to say”, but rather “to do”. The nature of a tree is known by the fruit it produces, and each tree produces a different kind of fruit. If a person’s heart is good, then what he/she produces will also be good, whereas if a person’s heart is evil, then the deeds of that person will also be evil.
Luke concludes his sermon with an exhortation to do what the Lord says rather then merely to call him Lord. There is no point in merely saying “I believe” if we are not going to show that belief in action.