Alastair Roberts on The Anchored Argosy

To clarify a bit, the boundary that I think needs to be made between secular politics and the Church is not merely or even primarily on account of ministers' lack of competence. It has much more to do with the nature of the minister's vocation and the danger of undermining it by 1) potentially confusing the authority that pastoral speech has with the expression of non-authoritative opinions (even very wise ones) on an area where ministerial authority does not apply; 2) implicitly aligning the Church and its politics with the lesser authorities of secular and partisan politics (similar to the reason why the king does not get involved in partisan politics).