In my style, Uechi Ryu, we bow in seiza and clap in the ceremonial ending to class. The clapping is a Shinto ritual, that is supposed to call the attention of your ancestor's spirits, so that they may see what your accomplishments. It is also a sign of respect for your forefathers. As a Christian, I have no problem participating in this ritual, precisely because that is what it is, a ritual. It does not demand faith, belief, or conviction. It does not require me to give up or compromise my faith in Christ. It is not a profession. Because of this fact alone, I have no problem participating in it; on the contrary, I think that it can be very benficial. I can take the meaning, honor to forefathers and to elders/teachers/sensei, without the Shinto undertones. There is nothing wrong with Buddhist meditation, even for a Christian, as the large number of Christian spiritual leaders who study eastern style meditation and mysticism to become closer to their God, Jesus, attests. Remember, there is not only one "proper" way to pray or show respect to God. It is your intent that matters. Besides, to truely understand MA, you have to understand to culture and ritual within which it obtains meaning. Karate is an "art," and, just as with a painting, to understand it, one must know its historical/philosophical/cultural background. These different patterns of thought will help you with your MA training, and may even help you with you spirituality as a Christian. At least they do for me.