On page 301 of C S Lewis and the Search for Rational Religion John Beversluis has a lovely passage from Mill. At the end Mill gives what I have long thought of as the Huck Finn response, but Huck seems to have derived it from Mill, so I will attribute it to Mill in future.

From Mill’s Examination of Sir William Hamilton’s Philosophy:

‘If in ascribing goodness to God I do not mean what I mean by goodness; if I do not mean the goodness of which I have some knowledge, but an incomprehensible attribute of an incomprehensible substance, which for aught I know may be a totally different quality from that which I love and venerate – and even must, if Mr. Mansel is to be believed, be in some important particulars opposed to this — what do I mean by calling it goodness? and what reason have I for venerating it? If I know nothing about what the attribute is, I cannot tell that it is a proper object of veneration. To say that God’s goodness may be different in kind from man’s goodness, what is it but saying, with a slight change of phraseology, that God may possibly not be good? To assert in words what we do not think in meaning, is as suitable a definition as can be given of a moral falsehood. Besides, suppose that certain unknown attributes are ascribed to the Deity in a religion the external evidences of which are so conclusive to my mind, as effectually to convince me that it comes from God. Unless I believe God to possess the same moral attributes which I find, in however inferior a degree, in a good man, what ground of assurance have I of God’s veracity? All trust in a Revelation presupposes a conviction that God’s attributes are the same, in all but degree, with the best human attributes. If, instead of the “glad tidings” that there exists a Being in whom all the excellences which the highest human mind can conceive, exist in a degree inconceivable to us, I am informed that the world is ruled by a being whose attributes are infinite, but what they are we cannot learn, nor what are the principles of his government, except that “the highest human morality which we are capable of conceiving” does not sanction them.; convince me of it, and I will bear my fate as I may. But when I am told that I must believe this, and at the same time call this being by the names which express and affirm the highest human morality, I say in plain terms that I will not. Whatever power such a being may have over me, there is one thing which he shall not do: he shall not compel me to worship him. I will call no being good, who is not what I mean when I apply that epithet to my fellow-creatures; and if such a being can sentence me to hell for not so calling him, to hell I will go.’

That is (surely) the only honourable position to take. We should not call any being good, who is not what we mean when we apply that epithet to our fellow humans. If we do we simply risk approving tyranny and cosmic sadism. We should not risk that.