(Acts 4:33) And with great power the apostles were giving their testimony to the resurrection of the Lord Jesus, and great grace was upon them all.
Jesus' disciples did not speak about witnessing the same way we Christians do today. We talk about "being witnesses", they talked about "being witnesses to the resurrection of Jesus Christ." We talk about "witnessing", they talked about "witnessing to the resurrection of Jesus Christ."
Question: When is the last time that you bore witness to the resurrection of Jesus? When is the last time you told someone (who does not already believe in Jesus) about Jesus' bodily resurrection from the grave 2000 years ago?
And note the wonderful result of their bearing "testimony to the resurrection of the Lord Jesus": great grace was upon them all.
Let no one who is not consistently telling others about the death and resurrection of Jesus Christ complain about a lack of grace in their church or family. Let us rather give ourselves to the means that God has promised to bless, namely, many simple, gladsome retellings of the Easter story throughout the year.