To minister is to serve and help those who need it. To be a minister is to be the one who serves and helps others. IMO of course. There is also the clergy aspect. Many people can and will be close minded and ignorant, Many of them on the religious front will call themselves christian. Many will think this makes them righteous and/or authoritative. Ignore them and accept them. Try to teach them if you want but be prepared to bang your head against the wall. Christianity despite popular belief does not hold the monopoly on religion or spirituality. Also remind yourself of the many good christians there are. It helps.