Cf. Blackstone, Introduction, §2. ``In relation to those laws which enjoin only positive duties, and forbid only such things as are not mala in se, but mala prohibita merely, without any intermixture of moral guilt, annexing a penalty to non-compliance, here I apprehend conscience is no further concerned, than by directing a submission to the penalty in case of our breach of those laws … the alternative is offered to every man, `either abstain from this or submit to such a penalty.'''