Albert Barnes Commentary Acts 2:43

"And fear came upon every soul: and many wonders and signs were done through the apostles." — Acts 2:43 (ASV)

And fear came. That is, there was great reverence or awe. The multitude had just before derided them (Acts 2:13); but so striking and manifest was the power of God on this occasion, that it silenced all clamors and produced a general veneration and awe. The effect of a great work of God's grace is commonly to produce an unusual seriousness and solemnity in a community, even among those who are not convicted. It restrains, subdues, and silences opposition.

Every soul. Every person, or individual; that is, fear came upon the people generally—not only on those who became Christians but also upon the multitudes who witnessed these things. All things were fitted to produce this fear: the recent crucifixion of Jesus of Nazareth, the wonders that attended that event, the events of the day of Pentecost, and the miracles performed by the apostles—all were fitted to diffuse solemnity, thought, and anxiety through the community.

Many wonders and signs. See Barnes on Acts 2:22.

This was promised by the Savior (Mark 16:17). Some of the miracles which they performed are specified in the following chapters.