(Verse 41) -  They that gladly received - The word rendered “gladly” means “freely, cheerfully, joyfully.” It implies that they did it without compulsion, and with joy. Religion is not compulsion. They who become Christians do it cheerfully; they do it rejoicing in the privilege of becoming reconciled to God through Jesus Christ. Though so many received his word and were baptized, yet it is implied that there were others who did not. It is probable that there were multitudes assembled who were alarmed, but who did not receive the word with joy. In all revivals there are many who become alarmed, and who are anxious about their souls, but who refuse to embrace the gospel, and again become thoughtless, and are ruined.

His word - The message which Peter had spoken respecting the pardon of sin through Jesus Christ.

Were baptized - That is, those who professed a readiness to embrace the offers of salvation. The narrative plainly implies that this was done the same day. Their conversion was instantaneous. The demand on them was to yield themselves at once to God. And their profession was made, and the ordinance which sealed their profession administered without delay.

And the same day - The discourse of Peter commenced at nine o’clock in the morning, (Acts 2:15). How long it continued it is not said; but the ceremony of admitting them to the church and of baptizing them was evidently performed on the same day. The mode in which this is done is not mentioned; but it is highly improbable that in the midst of the city of Jerusalem three thousand persons were wholly immersed in one day. The whole narrative supposes that it was all done in the city; and yet there is no probability that there were conveniences there for immersing so many persons in a single day. Besides, in the ordinary way of administering baptism by immersion, it is difficult to conceive that so many persons could have been immersed in so short a time. There is, indeed, here no positive proof that they were not immersed; but the narrative is one of those incidental circumstances often much more satisfactory than philological discussion, that show the extreme improbability that all this was done by wholly immersing them in water. It may be further remarked that here is an example of very quick admission to the church. It was the first great work of grace under the gospel. It was the model of all revivals of religion. And it was doubtless intended that this should be a specimen of the manner in which the ministers of religion should act in regard to admissions to the Christian church. Prudence is indeed required; but this example furnishes no warrant for advising those who profess their willingness to obey Jesus Christ, to delay uniting with the church. If persons give evidence of piety, of true hatred of sin, and of attachment to the Lord Jesus; they should unite themselves to his people without delay.

There were added - To the company of disciples, or to the followers of Christ.

Souls - Persons. (Compare 1 Pet. 3:20; Gen. 12:5). It is not affirmed that all this took place in one part of Jerusalem, or that it was all done at once; but it is probable that this was what was afterward ascertained to be the fruit of this day’s labor, the result of this revival of religion. This was the first effusion of the Holy Spirit under the preaching of the gospel; and it shows that such scenes are to be expected in the church, and that the gospel is suited to work a rapid and mighty change in the hearts of people.

(Verse 42) -  And they continued stedfastly - They persevered in, or they adhered to. This is the inspired record of the result. That any of these apostatized is nowhere recorded, and is not to be presumed. Though they had been suddenly converted; though they were suddenly admitted to the church; though they were exposed to much persecution and contempt, and to many trials, yet the record is that they adhered to the doctrines and duties of the Christian religion. The word rendered “continued stedfastly” means “attending one, remaining by his side, not leaving or forsaking him.”

The apostles’ doctrine - This does not mean that they held or believed the doctrines of the apostles, though that was true; but it means that they adhered to, or attended on, their teaching or instruction. The word doctrine has now a technical sense, and means a collection and arrangement of abstract views supposed to be contained in the Bible. In the Scriptures the word means simply “teaching”; and the expression here denotes that they continued to attend on their instructions. One evidence of conversion is a desire to be instructed in the doctrines and duties of religion, and a willingness to attend on the preaching of the gospel.

And fellowship - The word rendered “fellowship,” is often rendered “communion.” It properly denotes “having things in common, or participation, society, friendship.” It may apply to anything which may be possessed in common, or in which all may partake. Thus, all Christians have the same hope of heaven; the same joys; the same hatred of sin; the same enemies to contend with. Thus, they have the same subjects of conversation, of feeling, and of prayer; or they have communion in these things. And thus the early Christians had their property in common. The word here may apply to either or to all of these things to their conversation, their prayers, their dangers, or their property; and means that they were united to the apostles, and participated with them in whatever befell them. It may be added that the effect of a revival of religion is to unite Christians more and more, and to bring those who were before separated to union and love. Christians feel that they are a band of brethren, and that, however much they were separated before they became Christians, now they have great and important interests in common; they are united in feelings, in interests, in dangers, in conflicts, in opinions, and in the hopes of a blessed immortality.

Breaking of bread – Many of the versions render this “the eucharist” or the Lord’s Supper. It cannot, however, be determined whether this refers to their partaking of their ordinary food together, or to feasts of charity, or to the Lord’s Supper. The bread of the Hebrews was made commonly into cakes, thin, hard, and brittle, so that it was broken instead of being cut. Hence, to denote “intimacy or friendship,” the phrase “to break bread together” would be very expressive in the same way as the Greeks denoted it by drinking TOGETHER. From the expression used in Acts 2:44, compare with Acts 2:46, that they had all things common, it would rather seem to be implied that this referred to the participation of their ordinary meals. The action of breaking bread was commonly performed by the master or head of a family immediately after asking a blessing.

In prayers - This was one effect of the influence of the Spirit, and an evidence of their change. A genuine revival will be always followed by a love of prayer.