Hi MW,
It seems to me that this knowledge is available to all at all times but is obscured in us by self-reinforced obstacles. The underpinnings of these obstacles include such things as guilt, strong opinions, positions, doubt, unforgivenes, living in the past or future and judgement and measuring tendencies and the like. As these are removed, that which was always present and is self-evident naturally appears as if a wind moved a cloud out of the way to expose that sun that ever shines. Just one way to view the issue and consider.
Love and Peace,
JM