Tertullian

“ In Marcion’s god, however, goodness ceased from operation at some time or other. A goodness, therefore, which could thus at any time have ceased its action was not natural, because with natural properties such cessation is incompatible. And if it shall not prove to be natural, it must no longer be believed to be eternal nor competent to Deity; because it cannot be eternal so long as, failing to be natural, it neither provides from the past nor guarantees for the future any means of perpetuating itself. ”

“ Even if this were his purpose he would be malicious enough, for both wishing to aggravate his rival’s obloquy by permitting His (evil) works to be done, and by keeping the world harrassed by the wrong. What would you think of a physician who should encourage a disease by withholding the remedy, and prolong the danger by delaying his prescription, in order that his cure might be more costly and more renowned? ”

“ For what malignity is so great as to be unwilling to do good when one can, or to thwart [14] what is useful, or to permit injury? The whole description, therefore, of Marcion’s Creator will have to be transferred [15] to his new god, who helped on the ruthless [16] proceedings of the former by the retardation of his own goodness. For whosoever has it in his power to prevent the happening of a thing, is accounted responsible for it if it should occur. Man is condemned to death for tasting the fruit of one poor tree, [17] and thence proceed sins with their penalties ”