We are all within nature which feeds and takes us into her bounty and yet there is a comprehension that we are an individual within this great abide/
Sure there's a contradiction but living within this contradiction is the human condition as man, in one respect,expresses mortality, while at the same time presents as immortal being .
Being 'One with Brahman" , as pantheistic abstraction, is easy enough to express but the actual experience, as sought for by the Ancient Indian is the stuff Yogi's are made of.
The Ancient Indian, up into including the Buddha which is the culmination of the Eastern perspective, denied the "Ego" or "I" of Man and so any entry into Brahman was with complete loss of self, no contradiction noted. The new age with it's beginnings at our current era(2100 years ago) has the "Ego" released and Man can have a "sense of self" or "personality" while within the Brahman of the Ancient Indian.
This is one of the contradictions between the ancient and modern eras, the "Ego' of Man has hit the earth running.
Likewise tha ancient, for want of a better perspective, was not so much immersed within "morality" and this even continued up into the ancient Greeks. Read of the so called heathen exegesis/gods and the moral tenor or tone was not paramount . the Greek gods were more like us with passions, hates and no small amount of clever. You won't find a moral pontificate in, for example, the Iliad or the Odyssey.
The new age came through the ancient Hebrew and of course we have the Decalogue to which morality or moral tone is primary. Man "sins" only as an individual and for this he mandates a "personality' or "sense of "I".