Either allow the tree to be good, and it's fruit good; or shew the tree to be corrupt, and it's fruit corrupt: for the tree is known by it's fruit.

so every good tree yieldeth good fruit, but a corrupt tree produces bad fruit:

a good tree cannot produce evil fruit, nor can a corrupt tree bear good fruit:

And when the fruit-season drew near, he sent his servants to the husbandmen, to receive the fruits of it:

But many that are first shall be last, and the last first.

Is thine eye evil because I am good? Thus the last shall be first, and the first last; for there are many called, but few chosen.