Then said the Lord of the vineyard,.... Who planted it, and let it out to husbandmen, and expected fruit from it, and sent his servants from time to time for it:

what shall I do? or what can be done more than has been done? Isaiah 5:4 who else can be sent that is likely to do any good with such an ungrateful and unfruitful people?

I will send my beloved Son; the Lord Jesus Christ, the Son of God, who lay in his bosom, was the darling of his soul, and the delight of his heart; him he determined to send, and him he did send to the lost sheep of the house of Israel:

it may be they will reverence him, when they see him: it might be thought after the manner of men, that considering the greatness of his person, as the Son of God, the nature of his office, as the Redeemer and Saviour of men, the doctrines which he preached, the miracles which he wrought, and the holiness and harmlessness of his conversation, and the great good he did both to the bodies and souls of men, that he would have been had in great esteem and veneration with the men, to whom he was sent, and among whom he conversed: but, alas! when they saw him, they saw no beauty, comeliness, and excellency in him, and nothing on account of which he should be desired by them.

It may be (ἴσως)

Only here in New Testament. The adverb of ἴσος, equal. It expresses more than perhaps, implying rather a strong probability. Compare the phrase, it is an even chance that.

Reverence

See on Matthew 21:37.

Then said the lord of the vineyard, What shall I do? I will send my beloved son: it may be they will reverence him when they see him.

20:9-19 A certain man planted a vineyard. This parable is also in Mt 21:33-46 Mr 12:1-12. See notes on Matthew.

13. my beloved son-Mark (Mr 12:6) still more affectingly, "Having yet therefore one son, his well-beloved"; our Lord thus severing Himself from all merely human messengers, and claiming Sonship in its loftiest sense. (Compare Heb 3:3-6.)

it may be-"surely"; implying the almost unimaginable guilt of not doing so.

20:9-19 Christ spake this parable against those who resolved not to own his authority, though the evidence of it was so full. How many resemble the Jews who murdered the prophets and crucified Christ, in their enmity to God, and aversion to his service, desiring to live according to their lusts, without control! Let all who are favoured with God's word, look to it that they make proper use of their advantages. Awful will be the doom, both of those who reject the Son, and of those who profess to reverence Him, yet render not the fruits in due season. Though they could not but own that for such a sin, such a punishment was just, yet they could not bear to hear of it. It is the folly of sinners, that they persevere in sinful ways, though they dread the destruction at the end of those ways.