Re: Religion and Aikido
I highly recommend for your husband, if he is at all so inclined, Dom Aelred Graham's "Zen Catholicism." My wife decribed me as a Zen Catholic before she or I knew the book existed.
It is a rigorously orthodox examination with a delightfully welcoming approach to the intersection of the two disciplines. Fr. Robert Kennedy, S.J. (Jesuit, and a Catholic priest for the non-canonical among you) and also a holder of the Dharma as Roshi has also written two well-reputed books on the same topic, one titled "Zen Gifts for Christians" I think, which I, sadly, have not yet read. He has a zendo in (of course) California. Morningstar, it's called.
I love the quote of Fr. Kennedy's teacher on his website.
"I am not trying to make you a buddhist. I am trying to empty you in imitation of your Lord, Jesus Christ."