Which also; who verily (Revised Version, ὃς δή), the particle giving exactness, to the relative (see Dr. Moulton's note at the end of Winer, § 53). Some; ὃ μεν (Westcott and Hort). Neuter, and so the Vulgate.
Nominative, the thought refers to the seed as such (cf. Matthew 13:8). An hundred fold, some sixty, some thirty. "100 longius absunt a 60, quam 60 a 30. Habenti dabitur" (Bengel). The reason of the difference in the produce of the good ground is not stated, but, according to the tenor of the whole passage since Matthew 13:3.
this lay in a difference already existing within this good ground. Into the question of the ultimate cause of some men being in a better state of preparedness to receive Divine truths than others, our Lord does not enter.
Prevenient grace is not always to be insisted upon in practical exhortation.