And all things ... - He adds an encouragement for them to pray, assuring them that they should have all things which they asked.

This promise was evidently a special one, given to them in regard to working miracles. To them it was true, but it is manifest that we have no right to apply this promise to ourselves. It was desired especially for the apostles; nor have we a right to turn it from its original meaning. There are other promises in, abundance on which we "may" rely in prayer, with confident assurance that our prayers will be heard. Compare the notes at Matthew 7:7-11.

All things - ye shall ask in prayer, believing - In order to get salvation, there must be,

1. a conviction of the want of it: this begets,

2. prayer, or warm desires, in the heart: then

3. the person asks, i.e. makes use of words expressive of his wants and wishes:

4. believes the word of promise, relative to the fulfillment of his wants: and

5. receives, according to the merciful promise of God, the salvation which his soul requires.

And all things whatsoever,.... Not only miracles, but any other thing which may be for the honour of God, the interest of religion, the spreading of the Gospel, the enlargement of the kingdom, of Christ, their own spiritual good, and the welfare of immortal souls,

ye shall ask in prayer, believing. Munster's Hebrew Gospel reads it, "in prayer, and in faith"; and the Arabic version renders it, "in prayer with faith"; both to the same purpose, and aptly express the sense of the words, which design the prayer of faith; or that prayer which is put up in the strength of faith; and is of great avail with God: for whatever is asked in faith, agreeable to the will of God, which is contained in his covenant, word, and promises, and makes for his glory, and the good of his people, shall be given, be it what it will; though to carnal sense and reason it may seem impracticable and impossible:

ye shall receive; of God, through Christ, freely and fully, and shall have and enjoy them, either they themselves, if asked for themselves, or others, for whom they are asked.

And all things, whatsoever ye shall ask in prayer, believing, ye shall receive.

21:21,22 If ye have faith. See PNT Mt 17:19.

21:18-22 This cursing of the barren fig-tree represents the state of hypocrites in general, and so teaches us that Christ looks for the power of religion in those who profess it, and the savour of it from those that have the show of it. His just expectations from flourishing professors are often disappointed; he comes to many, seeking fruit, and finds leaves only. A false profession commonly withers in this world, and it is the effect of Christ's curse. The fig-tree that had no fruit, soon lost its leaves. This represents the state of the nation and people of the Jews in particular. Our Lord Jesus found among them nothing but leaves. And after they rejected Christ, blindness and hardness grew upon them, till they were undone, and their place and nation rooted up. The Lord was righteous in it. Let us greatly fear the doom denounced on the barren fig-tree.