The book has a delightful list of Bible verses such as Psalm 46:10 Be still and know that I am God. "Zazen certainly actualizes this in the purest way." Luke 17: 20 - 21 The kingdom of God comes not from observation: Neither shall they say, Lo here! or Lo there! For, behold, the kingdom of God is within you.
For Matthew 6:5-7, he writes, "There is no purer way of expressing this attitude toward prayer than zazen."
Chapter 7 - Living Wide Awake: Section - Zazen as Religion, page 111-112, Opening the Hand of Thought by Zosho Uchiyama
I found the Chapter 7 - Living Wide Awake: Section - Vow and Repentance, (page 112) to be very helpful in highlighting some of the similarities and differences with Christianity. Here are a few quotes:
______
Doing zazen is letting go of clinging to human thought, and this means letting go, or throwing out, human arrogance. With that we become, as the Bible says, "as God wills," and then "the works of God will be manifest" (John 9:3).
Living by zazen as religion is found in our functioning day-to-day as a person, a role that is itself the personified union of this moment and eternity. Living everyday by surrendering to zazen, being protected and guided by zazen, means to live having a direction - that is, living without being pulled around by the thoughts and emotions rampaging inside us. This means to live aiming at enacting the unity of the present and the eternal.
Taking as reality what precedes division, we will not conjure up objects of desire, opponents, competitors, and so on. As long as we are walking in this direction we will not labor under the burdens of greed, impatience, and envy; we will not go around cheating, deceiving, wounding, and killing one another. Rather, as true self that is only true self, we possess absolute peace within us at the same time, since we are aiming at manifesting the vigorous self that is here and now, and is simultaneously one with eternity, we need to make a ceasing effort.
In other words, for the person who sits zazen, vow is nothing other than the practitioner's own life. We take all encounters - with things, situations, people, society - as nothing but our own life, and we act with a spirit of looking after everything as our own life. Therefore, like the mother's caring for her child, we aim to function unconditionally and tirelessly and, moreover, to do so without expecting any reward.
It is not to profit personally or to become famous that we take good care of things, devote ourselves to our work, love those whom we encounter, or demonstrate our concern for social problems. When I take care of my own life, I take care of the world as my own life. I do this moment by moment, and each situation I enable the flower of my life to bloom, working solely that the light of buddha may shine.
-------
I was just thinking yesterday, before I read this section of this chapter of how I used to think "Well, Christianity is an organized way of living ones life that is followed by millions of people." With my limited knowledge of Buddhism, I only knew American Zen as a fringe group with ideas that were very hard to understand and comprehend. Yesterday, I realized these views have reversed. I see mainstream Christianity has a confusing mishmash of "mysteries" that are difficult to explain. While theologians have written endless volumes, I don't think the average Christian understands or believes most of this. In fact, I would wager that most Christians hold heretical beliefs that the church over the years has fought wars over. I mean this for the individual Christians within each of the denominations that are divided also over the true faith. As a teacher of Sunday School, I particularly noticed the lack of depth in theology while these people have a deep faith that really impressed me. So the benefits of the faith did not come from having the true tenets of the faith but from a deep faith that comes out of the human spirit.
It's strange also that theology is about Jesus rather than being what Jesus taught. Original sin, Triune God; That's not what Jesus talked about. The apostle Paul developed a lot of the theology along with the extensive gospel of John that puts so many words in the mouth of a crazy, verbose Jesus.
Like 4:16-21 Then [Jesus] came to Nazareth where he had been brought up and, according to his custom, went to the synagogue on the Sabbath day. He stood up to read the scriptures and the book of the prophet Isaiah was handed to him. He opened the book and found the place where these words are written—‘The Spirit of the Lord is upon me, because he has anointed me to preach the Gospel to the poor. He has sent me to heal the brokenhearted, to preach deliverance to the captives and recovery of sight to the blind, to set at liberty those who are oppressed, to preach the acceptable year of the Lord’. Then he shut the book, handed it back to the attendant and resumed his seat. Every eye in the synagogue was fixed upon him and he began to tell them, “This very day this scripture has been fulfilled, while you were listening to it!”