From ego, this perspective is extremely difficult to recognize or experience. When one has a transcendent peace, or waking experience one can only conclude that it is true.
Working with many people who have come face to face with their mortality has taught me that higher consciousness often accompanies the failure of our temporal knowledge. As one detaches from ego function, that is the things that can be taken from us, one is left with that which is “within us”. We see examples of this when people lose everything materialistic and yet somehow find a quiet peace and gratitude. I have experienced people losing parts and function of their bodies, have lost loved ones, have lost property and yet have transcendent peace. This peace is not a product of ego function (attachment) but it is a knowing, which knowing comes from inner awareness or stillness. This can only come from the journey inward.
(1) The ‘scholars’ translation of the Gospel of Thomas by Stephen Patterson and Marvin