But when the fruit is ripe ( ὅταν δὲ παραδῷ ὁ καρπὸς). The verb here is active; it might be rendered delivereth up, or alloweth. It is a peculiar expression, though evidently meaning "when the fruit is ready."
He putteth forth the sickle, because the harvest is come. As soon as Christ's work is completed, whether in the Church or in the individual, "immediately" the sickle is sent forth. As soon as a Christian is ready for heaven, God calls him away; and therefore we may infer that it is unwise, if not sinful, for a Christian, pressed it may be with sickness or trouble, to be eager in wishing to leave this world.
"It is one thing to be willing to go when God pleases; it is another thing to speak as though we wished to hasten our departure." "When the fruit is ripe, immediately he putteth forth the sickle." If therefore, the sickle is not yet sent forth, it is because the fruit is not yet fully ripe.
The afflictions of the faithful are God's means to ripen them for heaven. They are the dressing which the Lord of the vineyard employs to make the tree more fruitful, to make the Christian more fruitful in grace, and more ripe for glory.