We dare not forget G. K. Chesterton’s aphorism: while a coziness between church and state may be good for the state, it is bad for the church. Herein lies the chief danger to grace: the state, which runs by the rules of ungrace, gradually drowns out the church’s sublime message of grace….
A state government can shut down stores and theaters on Sunday, but it cannot compel worship. It can arrest and punish KKK murderers but cannot cure their hatred, much less teach them love. It can pass laws making divorce more difficult but it cannot force husbands to love their wives and wives their husbands. It can give subsidies to the poor but cannot force the rich to show them compassion and justice. It can ban adultery but not lust, theft but not covetousness, cheating but not pride. It can encourage virtue but not holiness.
— Philip Yancey, Glimpses of Grace, p. 357