There is risk, and no guarantee. The very search for guarantee is wrong and really means subjecting the higher to the lower. Freedom of the spirit knows no guarantees. The sole criterion of truth is truth itself, the light which streams out of it. Truth has nothing to do with the objective world, but rather is related to spirit.
Truth is something present and immediate.
Truth is the awakening of spirit in man, his communion with spirit. Truth is the end of this objective world, it demands our consent to this end. Spirit Like truth, the spiritual dimension is not arrived at from the natural world. It exists in its own right and does not need to be proven or demonstrated. To seek to do so is to put the cart before the horse.