Jamieson, Fausset and Brown on Matthew 13:30-39

30-39. Let both grow together--that is, in the visible Church.

until the harvest--till the one have ripened for full salvation, the other for destruction. (See on Mt 13:39).

and in the time of harvest I will say to the reapers--(See on Mt 13:39).

Gather ye together first the tares, and bind them in bundles to burn them--"in the fire" (Mt 13:40).

but gather the wheat into my barn--Christ, as the Judge, will separate the two classes (as in Mt 25:32). It will be observed that the tares are burned before the wheat is housed; in the exposition of the parable (Mt 13:41, 43) the same order is observed: and the same in Mt 25:46--as if, in some literal sense, "with thine eyes shalt thou behold and see the reward of the wicked" (Psa 91:8).

Third and Fourth Parables or Second Pair:

The Mustard Seed and The Leaven (Mt 13:31-33).

The subject of both these parables, as of the first pair, is the same, but under a slight diversity of aspect, namely--

The GROWTH OF THE KINGDOM FROM THE Smallest Beginnings to Ultimate Universality.

The Mustard Seed (Mt 13:31, 32).