Modern philosophers have not seriously considered the imagination as an avenue to truth, partly because those philosophers, particularly the British empiricists, have been preoccupied with external observations. Are there worlds within the mind, just as much as there is a fixed world without? Exploring these worlds may be a needed avenue to open us to a new appreciation of truth. William Blake is the poet renowned for his creative imagination. In examining his writings, one finds many messages about how imagination can offer us an insight into 'truth'. This work explores such a possibility, which Blake's writings have suggested, and which may offer a fruitful approach to truth today.