Pseudo-Chrysostom
Catena Aurea · Markusevangelium 4
And he said, So is the kingdom of God, as if a man should cast seed into the ground; And should sleep, and rise night and day, and the seed should spring and grow up, he knoweth not how. For the earth bringeth forth fruit of herself; first the blade, then the ear, after that the full corn in the ear. But when the fruit is brought forth, immediately he putteth in the sickle, because the harvest is come.
(Vict. Ant. e Cat. in Marc.) Or, first it produces the blade, in the law of nature, by degrees growing up to advancement; afterwards it brings forth the ears, which are to be collected into a bundle, and to be offered on an altar to the Lord, that is, in the law of Moses; afterwards the full-fruit, in the Gospel. Or because we must not only put forth leaves by obedience, but also learn prudence, and, like the stalk of corn, remain upright without minding the winds which blow us about. We must also take heed to our soul by a diligent recollection, that, like the ears, we may bear fruit, that is, shew forth the perfect operation of virtue.