Without contraries is no progression. Attraction and repulsion, reason and energy, love and hate, are necessary to human existence. – William Blake
What is grand is necessarily obscure to weak men. That which can be made explicit to the idiot is not worth my care. – William Blake
The generations of men run on in the tide of time, but leave their destined lineaments permanent for ever and ever. – William Blake
It is not because angels are holier than men or devils that makes them angels, but because they do not expect holiness from one another, but from God alone. – William Blake
The beginning, middle, and end of the birth, growth, and perfection of whatever we behold is from contraries, by contraries, and to contraries; and whatever contrariety is, there is action and reaction, there is motion, diversity, multitude, and order, there are degrees, succession and vicissitude. – Giordano Bruno