From 21st Century Science and Health:
On the road to Emmaus, Jesus was known to his friends by the words that made their hearts burn within, and by the breaking of bread. The divine Spirit, which identified Jesus centuries ago, has spoken through the inspired Word and will speak through it in every generation and milieu. Spirit is revealed to the receptive heart and is again seen driving out evil and healing the sick.
Physique is not Spirit, and Jesus proved this point. After his resurrection he proved to the physical senses that his body was not changed until he ascended in thought; in other words, until his understanding of Spirit, God, expanded. To convince Thomas that mortality has nothing to do with Spirit, Jesus caused him to examine the nail marks and the spear-wound.
Jesus’ unchanged physical state after the resurrection posits a progressive state beyond the grave. The spiritual growth that allowed Jesus to rise from the dead was increased even more to allow him to ascend. Jesus was “the way;” that is, he marked the way for humankind. The final display, called the ascension, closed the earthly record of Jesus, and this world’s human minds and physical senses could no longer detect Jesus.
After Jesus’ ascension, his students received the Holy Spirit. Meaning, that by all they had witnessed and suffered they were wakened to a clearer understanding of divine Science. The scientific spiritual interpretation and understanding of Jesus’ teachings and demonstrations gave them a faint conception of the Life that is God. This allowed them to stop interpreting people through human knowledge and turn their thoughts instead to divine knowledge. Through the Holy Spirit they gained the true interpretation of their glorified Master and became better healers, leaning no longer on matter or human mind, but on divine Principle.
 Luke 24:13
 John 20:27
 John 14:6