I don’t know what your view is.
In some measure the “gate of sameness” may be considered to correspond to “God”
‘in some measure’ and ‘may be considered’ leave a great deal of swingroom.
One of the quotes was from Jesus.
Soyen Shaku seems to have been more OT than NT and Jesus.
Soyen served as a chaplain to the Japanese army during the Russo-Japanese War. In 1904, the Russian author Leo Tolstoy wrote Shaku to join him in denouncing the war. Shaku refused, concluding that “…sometimes killing and war becomes necessary to defend the values and harmony of any innocent country, race or individual.” (quoted in Victoria, 1997) After the war, Shaku attributed Japan’s victory to its samurai culture.
When I read the quote by him that you included, I see a kind of monism that I do not see in Christianity. It’s more of a pantheism possibly panentheism.
https://www.google.com/search?q=panentheism+vs+pantheism&client=firefox-b-d&sxsrf=ALeKk02H1hX7hSddM5PwnzIExEuwzInVcw:1603920727698&tbm=isch&source=iu&ictx=1&fir=-CJEKgSN9P1NeM%252C_Q3UzShXdJR0AM%252C%252Fm%252F05wg1&vet=1&usg=AI4_-kRT9kxmsGtr5ZR5Cmlbn9Iz5kkLJQ&sa=X&ved=2ahUKEwiBn-OpntjsAhVCi8MKHdtvAIMQ_B16BAglEAM#imgrc=Ci2QHjXjViv4-M
That Buddhism and Gnostic Christianity have some affinity, that I can see. But otherwise God is way too personified and active in C. Plus the practices are very different and the attitude between a Zen Master and his students is also quite different from that of Jesus to his disciples. Let alone Samuri culture which Soyen seems to have approved of.
EVen something like this…
But the very constitution of the mind demands a unifying principle which is an indispensable hypothesis for our conception of phenomenality
is more like Kantian analysis then the kinds of assertions and posited entities asserted in either the OT or the NT. Deduced abstract principles vs. directly posited deity.
My point is not that they can’t possibly mean the same thing as each other, but I see little reason to believe it. Different practices that engage different parts of the brain, personification vs. non-personification, quite different relations between masters and disciples (especially in Zen), different descriptions, different metaphors and in my experience master practitioner groups with rather different priorities around emotions, interpersonal relations, the role or morality, conceptions of the afterlife (if any) and more.