First Mary Magdalane, then the deciples (including eventaully doubting Thomas) and then by people in general.
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They do.
It is recorded that over 500 witnessed the resurrected Jesus, but no one is recorded as having witnessed Jesus' resurrection itself.
They were witnesses of his resurrection and they preached the Gospel according to his commandment.
In the Gospel of Luke, 13 - 53, two disciples of Jesus met, spoke and ate with him after his crucifixion and resurrection, then told others about the event. Jesus' followers believed the witnesses and so more readily believe in the resurrection themselves.
The four gospels and Acts of the Apostles provide various different versions of Jesus meeting some of his followers after his resurrection, but none of them makes any mention of any independent witnesses ever seeing Jesus with any of his followers.
Of course.(and his death also.)(and his resurrection also)(and his enthronement as King of God's Kingdom in 1914 also)
Jesus did not set up any organisation. He simply called the 12 to be his followers and to make them "fishers of men". They were "witnesses of his resurrection" (Acts 4.33)
The jobs that most of the 12 apostles did before they met Jesus involved tax gathering and fishing. But when Jesus rose from the dead and after Pentecost, they were all witnesses of his resurrection, and as Jesus said, they were "fishers of men."
Just like a court room has witnesses who tells the jury what happened or what they saw, in the same way the Apostles did the same for Jesus Christ, when they witnessed his miracles, his teachings, and his death and resurrection. Also in Christendom, to be "a witness" means to tell others about Jesus Christ and the things that He did and said.
No. They did not believe in a resurrection, and Jesus is the resurrection and the life, (John 11.25)
After the resurrection of Jesus Christ.
Matthias the Apostle was chosen to replace Judas Iscariot as one of the Twelve Apostles. Before being chosen, Matthias was a witness to Jesus's ministry and resurrection.