William Thomas Walsh
Peter and his fellow apostles …became more and more convinced that their master had truly risen. In fact, they were so sure of it, that they spent the rest of their lives going about the world teaching it as the chief and fundamental reason why men should accept Him as Christ. To men of their sort with almost no resources, this meant a perpetual and staggering record of self-sacrifice, with constant hardship, suffering, persecution, and nothing to look forward to at the end but a bloody death like His. Such men do not ordinarily get themselves crucified or beheaded for an illusion, much less for a lie.