Certainty grows out of consensus, and consensus determines the mental separation between different groups of people, each certain of the importance and righteousness of its own tradition and dogma. Humanity is broken up along the boundary lines created by sectarian consensus and self-centered memory.
Doubt, on the other hand, grows out of a rare capacity to rely on independent perception to critically question group think while risking the identity crisis that comes with the loss of company, which is the loss of certainty.
More often than not, the doubting mind finds its incipient uncertainty intolerable, and soon relieves the stress by going back to its original group of reference, or by joining a different cultural consensus offering a better sense of personal identity and psychological security.
However, if the doubt is strong enough, even if greatly uncertain, the mind is able to stand alone. From that position of radical independence the entire tribal and psychological division of humanity can be clearly seen along with the endless conflict and sorrow it engenders.
Because it brings unprecedented integrity and health to the human mind, this non-aligned, and therefore impersonal sight of (and insight into) the human condition is, in itself, a radical departure from it. In other words, the well-being and ultimate fate of our species depends strictly on the willingness of a critical number of individuals to question and then abandon their myopic identification with particular ideological enclaves both tribal and personal.
A free, intelligent, and therefore caring mind is one in which thought, feeling, and action are no longer constricted and made contentious by the bias and other limitations typical of personal identification with gender, race, age, appearance, religion, nationality, cultural tradition, social and economic status, profession, sexual orientation, aesthetic preference, etc.
This order of intelligence and all-encompassing affection is our natural meeting point, the common ground from which an entirely different human culture may emerge, but only if enough of us bother to leave behind our dysfunctional comfort zones. Failure to do so implies willingly choosing at every instant to continue being a particular expression of a general mindset that keeps generating modified versions of the same general reality of separation, violence, and grief. Only opening up to our unmediated and mysterious presence in life can save us from the folly of our ethnocentric and egotistical selves.