[Blake] asserts that the spirits, wonders and beauties that are found in nature all ultimately come from the human heart. [...] There is, for Blake, no means of describing nature apart from the human perspectives that we have on it, and nature is therefore something interior to humans rather than exterior to them: its only perceivable life lies within us. [...] Thinking of nature as having a 'real' external existence outside of humanity is, for Blake, just another return to abstraction.
Jonathan Roberts, William Blake’s Poetry (p.71)












