The Renaissance had proclaimed the dignity of man considered as a mundane creature, and not in his relation to a hypothetical other-world.

It abundantly manifested the beauty and the joy afforded by existence on this planet, and laughingly discarded past theological determinations to the contrary of its new Gospel.

Bruno undertook the systematization of Renaissance intuitions; declared the divine reality of Nature and of man; demonstrated that we cannot speculate God, cannot think ourselves, cannot envisage the universe, except under the form of one living, infinite, eternal, divinely-sustained and soul-penetrated complex.

He repudiated authority of every sort, refusing to acknowledge the decrees of the Church, freely criticising past philosophers, availing himself of all that seemed to him substantial in their speculations, but appealing in the last resort to that inner witness, that light of reason, which corresponds in the mental order to conscience in the moral.

As he deified Nature, so he emancipated man as forming with Nature an integral part of the supreme Being.