A long and winding turn of self perception

Humility does not mean thinking less of yourself than of other people, nor does it mean having a low opinion of your own gifts.  It means freedom from thinking about yourself at all.  ~William Temple

This would be the answer to all my questions. How should we challenge our self perception. Apparently we shouldn't even be perceiving about ourselves. Think about how subjective we can get when we judge the people around us and imagine us judging ourselves and you see how unreliable we are. And then see how little others would know about us, and how in the same way we do they make preconceived judgements about us. Imagine how little we know about others, and how our understanding of others are limited with the senses of our own shackling body. What do we know of other people? What do we even know of ourselves?