"The principal problem is that textual data and material remains are often incomplete and sometimes lack adequate context, in order to know precisely how they correlate. Sometimes all we can say is that the textual data and the material remains are probably related but how exactly can't be said until additional discoveries are made."

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When each thought absorbs your attention completely, it means you identify with the voice in your head. Thought then becomes invested with a sense of self. This is the ego, a mind-made "me." That mentally constructed self feels incomplete and precarious. That's why fearing and wanting are its predominant emotions and motivating forces.

— Eckhart Tolle