Matthew 7:17-18

good tree cannot bring forth evil fruit.

In these two verses the Lord points to the uniform law of nature. Every tree bears after its kind. As is the tree so is the fruit. The grape bears grapes, the fig figs, and the thistle thistles. The same principle holds good in the moral world.. good man will show forth good deeds, or will bear good fruit in his life, while. bad man will bear fruit according to his nature. If. man claims to be. teacher sent from God and lives an evil life, like Joe Smith or Brigham Young, for instance, it is evident that they have corrupt natures and are deceivers. In other words, the Savior bids us look at the life of every teacher. This applies to the preacher, the Sunday-school superintendent, and the Sunday-school teacher. Do they live good, exemplary lives? Then they are good trees.