It's interesting what he says here, "that you may have certainty concerning the things you have been taught."
Then it Acts he says, " In my former book, Theophilus, I wrote about all that Jesus began to do and to teach 2 until the day he was taken up to heaven, after giving instructions through the Holy Spirit to the apostles he had chosen. 3 After his suffering, he presented himself to them and gave many convincing proofs that he was alive."
Part of what he is claiming is that we can know for a certainty that Jesus showed himself to be alive with many convincing proofs. Yet, the Baha'i Faith, whose prophet claims to be sent by God,
doesn't support that Jesus was alive.
From the Writings of 'Abdu'l-Bahá
The Cause of Christ was like a lifeless body; and when after three days the disciples became assured and steadfast, and began to serve the Cause of Christ, and resolved to spread the divine teachings, putting His counsels into practice, and arising to serve Him, the Reality of Christ became resplendent and His bounty appeared; His religion found life; His teachings and His admonitions became evident and visible. In other words, the Cause of Christ was like a lifeless body until the life and the bounty of the Holy Spirit surrounded it.
Such is the meaning of the resurrection of Christ, and this was a true resurrection....
From letters written on behalf of the Guardian
We do not believe that there was a bodily resurrection after the Crucifixion of Christ, but that there was a time after His Ascension when His disciples perceived spiritually His true greatness and realized He was eternal in being. This is what has been reported symbolically in the New Testament and been misunderstood. His eating with His disciples after resurrection is the same thing.
Now whether a person believes the resurrection of Jesus was true or not doesn't matter. Luke in his gospel and by what he says in Acts make it clear that what he is claiming is Jesus came back to life after being killed.
The Baha'i claim is that it was not a literal, physical resurrection. They make the claim that all those verses that talk about the resurrection and appearances of Jesus were all symbolic... none of that stuff really happened. All the things that Luke says did happen... including Jesus showing himself to be alive by many proofs.
Baha'is can't have the resurrection stories being true. To help call them into question, it doesn't hurt to say that the gospels were written by people that weren't even eyewitnesses.
Yet, Baha'is also claim they believe in Jesus? And that is based on the few true things they believe in that are found in those same gospels. Weird stuff going on.