The lord of the vineyard addresses one of those hired first, as representative of all. He makes it individual, personal – this is an answer to Peter.
We all have our own individual relationship with the Lord and we all have reason to be eternally grateful. What he has stored up for us is beyond our ability to estimate. If, instead of being grateful for what we have received and being satisfied with this, our eye is on others, and we are comparing what they had received with what we have received, then we have lost sight of the grace of God. How can we make this comparison, when what we have received has been received as a free gift? Any tendency to compare ourselves with others shows that we have forgotten that we deserve nothing. We deserve nothing, and they deserve nothing, and if God in his goodness decides, for reasons that we cannot look into, to give them as much as us, then who are we to question his liberality? When we first come to Christ for forgiveness and new life, we are overwhelmed by what he gives us, and we say, ‘I do not deserve any of this.’ Are we going to change our minds later and start thinking that, after all, we partly deserve it?