And although now our human nature be not endowed with that original soundness and righteousness which the first man had in his creation, but on the contrary be greatly depraved by sin, yet still the holy inclination to love God above all things stays with us, as also the natural light by which we see his sovereign goodness to be more worthy of love than all things; and it is impossible that one thinking attentively upon God, yea even by natural reasoning only, should not feel a certain movement of love which the secret inclination of our nature excites in the bottom of our hearts, by which at the first apprehension of this chief and sovereign object, the will is taken, and perceives itself stirred up to a complacency in it.
It happens often amongst partridges that one steals away another's eggs with intention to sit on them, whether moved by greediness to become a mother, or by a stupidity which makes them mistake their own, and behold a strange thing, yet well supported by testimony! -- the young one which was hatched and nourished under the wings of a stranger partridge, at the first call of the true mother, who had laid the egg whence she was hatched, quits the thief-partridge, goes back to the first mother, and puts herself in her brood, from the correspondence which she has with her first origin. Yet this correspondence appeared not, but remained secret, shut up and as it were sleeping in the bottom of nature, till it met with its object; when suddenly excited, and in a sort awakened, it produces its effect, and turns the young partridge's inclination to its first duty. It is the same, Theotimus, with our heart, which though it be formed, nourished and bred amongst corporal, base and transitory things, and in a manner under the wings of nature, notwithstanding, at the first look it throws on God, at its first knowledge of him, the natural and first inclination to love God which was dull and imperceptible, awakes in an instant, and suddenly appears as a spark from amongst the ashes, which touching our will gives it a movement of the supreme love due to the sovereign and first principle of all things.