As all, I am sure, are probably aware, the early Christians were criticized for their belief in the Resurrection. It was one of the primary subjects of the earliest apologetic works of the Church Fathers. Some of the Fathers wrote on the subject in the context of their own suffering, even martyrdom.
Clement of Rome wrote:
Day and night declare to us a resurrection. The night sinks to sleep, and the day arises; the day again departs, and the night comes on. Let us behold the fruits of the earth, how the sowing of grain takes place. The sower goes forth, and casts it into the ground; and the seed being thus scattered, though dry and naked when it fell upon the earth, is gradually dissolved. Then out of its dissolution the mighty power of the providence of the Lord raises it up again, and from one seed many arise and bright forth fruit. Having then this hope, let our souls be bound to Him who is faithful in His promises, and just in His judgments. He who has commanded us not to lie, shall much more Himself not lie. The apostles have preached the Gospel to us from the Lord Jesus Christ; Jesus Christ has done so from God. Christ therefore was sent forth by God, and the apostles by Christ. Both of these appointments, then, were made in an orderly way, according to the will of God. Having therefore received their orders, and being fully assured by the resurrection of our Lord Jesus Christ, and established in the word of God, with full assurance of the Holy Spirit, they went forth proclaiming that the Kingdom of God was at hand.
Clement, looking around at creation and seeing how God has planned it and accepting the word of the apostles and others who knew the Lord, declares that it is totally reasonable to believe in the Resurrection of our Lord.
Our Father among the Saints, Irenaeus, wrote:
For as the Lord went away in the midst of the shadow of death, where the souls of the dead were, yet afterwards arose in the body, and after the resurrection was taken up into heaven, it is manifest that the souls of His disciples also, upon whose account the Lord underwent these things, shall go away into the invisible place allotted to them by God, and there remain until the resurrection, awaiting that event; then receiving their bodies, and rising in their entirety, that is bodily, just as the Lord arose, they shall come thus into the presence of God. For no disciples is above the Master, but every one that is perfect shall be as his Master. As our Master, therefore, did not at once depart, taking flight to heaven, but awaited the time of His resurrection prescribed by the Father, which had been also shown forth through Jonas, and rising again after three days was taken up to heaven; so ought we also to await the time of our resurrection prescribed by God and foretold by the prophets, and so, rising, be taken up, as many as the Lord shall account worthy of this privilege.