Might you mean something like Taoism?
Opening lines of the Tao Te Ching by Lao Tzu:
"The Tao that can be told is not the eternal Tao. The name that can be
named is not the eternal name. The nameless is the beginning of heaven
and earth. The named is the mother of ten thousand things. Ever
desireless, one can see the mystery. Ever desiring, one can see the
manifestations. These two spring from the same source but differ in
this appears as darkness. Darkness within darkness. The gate to all mystery."
From the poem 'Xinxin Ming', (Verses on Faith in Mind) by Third Chinese Zen Patriarch Jianzhi Sengcan:
"The Great Way is not difficult for those who have no preferences.
When love and hate are both absent, everything becomes clear and
undisguised. Make the smallest distinction, however, and heaven and
earth are set infinitely apart. If you wish to see the truth, then
hold no opinions for, or against, anything. To set up what you like
against what you dislike is the disease of the mind. When the deep
meaning of things is not understood, the mind's essential peace is
disturbed to no avail.
"The Way is perfect, like vast space where nothing is lacking and
nothing is in excess. Indeed, it is due to our choosing to accept or
reject that we do not see the true nature of things. Live neither in
the entanglements of outer things, nor in inner feelings of emptiness.
Be serene in the oneness of things, and such erroneous views will
disappear by themselves. When you try to stop activity to achieve
passivity, your very effort fills you with activity. As long as you
remain in one extreme or the other, you will never know Oneness.
Those who do not live in the single Way fail in both activity and
passivity, assertion and denial. To deny the reality of things is to
miss their reality; to assert the emptiness of things is to miss their
reality. The more you talk and think about it, the further astray you
wander from the truth. Stop talking and thinking, and there is
nothing you will not be able to know."
I fear though that you are orientalising, mistaking mystic thinking like this, as being without 'scrutiny', whatever you mean by that. These foundational texts above embody sophisticated reactions to ongoing debates and practices, just like Western philosophical and religious treaties. This article draws parallels between the thinking of Buddhist philosopher Nagarjuna, and more recent Western philosophers, in regard to a kind of non-dual using thinking to escape thinking, eg 'Wittgenstein's Ladder'.
Mysticism has been part of Western thinking, such as Anchorite practices and the Desert Fathers, and hesychasm chanting in the Eastern Orthodox church, and Sufism which started in Turkey. But the rise of centralised militaristic states, and of technology and science, pushed these strands to the margins in a way that did not happen in India & China. In contrast, China institutionally suppressed their school of logic, Mohism.