Without contraries is no progression. Attraction and repulsion, reason and energy, love and hate, are necessary to human existence. – William Blake
Can I see anothers woe, and not be in sorrow too? Can I see anothers grief, and not seek for kind relief? – William Blake
If the doors of perception were cleansed every thing would appear to man as it is: infinite.
For man has closed himself up, till he sees all things thro narrow chinks of his cavern. – 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