In so many and such important ways, then, do the planets bear witness to the earth's mobility.

In the first book I shall describe all the positions of the spheres, along with the motions which I attribute to the Earth, so that the book will contain as it were the general structure of the universe. In the remaining books I relate the motions of the remaining stars, and all the spheres, to the mobility of the Earth, so that it can be thence established how far the motions and appearances of the remaining stars and spheres can be saved, if they are referred to the motions of the Earth.

Of all things visible, the highest is the heaven of the fixed stars.

More stars in the north are seen not to set, while in the south certain stars are no longer seen to rise.

To know the mighty works of God, to comprehend His wisdom and majesty and power; to appreciate, in degree, the wonderful workings of His laws, surely all this must be a pleasing and acceptable mode of worship to the Most High, to whom ignorance cannot be more grateful than knowledge.

In so many and such important ways, then, do the planets bear witness to the earth's mobility.

At rest, however, in the middle of everything is the sun.