It is the very error of the moon;She comes more nearer earth than she was wont,And drives men mad.

Men are like the earth and we are the moon; we turn always one side to them, and they think there is no other, because they don't see it / but there is.

Concerning God, free will and destiny: Of all that earth has been or yet may be, all that vain men imagine or believe, or hope can paint or suffering may achieve, we descanted.

What custom wills, in all things should we do't,
The dust on antique time would lie unswept,
And mountainous error be too highly heaped
For truth to o'erpeer.

I had rather be a dog, and bay the moon, Than such a Roman

Do not swear by the moon, for she changes constantly. then your love would also change.