Timothy Keller.
“The Bible binds my conscience to care for the poor, but it does not tell me the best practical way to do it. Any particular strategy (high taxes and government services vs low taxes and private charity) may be good and wise and may even be somewhat inferred from other things the Bible teaches, but they are not directly commanded and therefore we cannot insist that all Christians, as a matter of conscience, follow one or the other. The Bible binds my conscience to love the immigrant–but it doesn’t tell me how many legal immigrants to admit…. every year. It does not exactly prescribe immigration policy. The current political parties offer a potpourri of different positions on these and many other topics, most of which, as just noted, the Bible does not speak to directly. This means when it comes to taking political positions, voting, determining alliances and political involvement, the Christian has liberty of conscience. Christians cannot say to other Christians ‘no Christian can vote for…’ or ‘every Christian must vote for…’ unless you can find a Biblical command to that effect.”