Should we rely on prayer and not use medical technology? No.
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I don’t think the best approach is to say, ‘God will heal me, so I’m just going to pray.’ Usually God works through natural means. He expects us to make use of the gifts he has provided to us, such as medication and technology. Otherwise, it would be like expecting manna to fall from heaven when there’s a grocery store down the corner. The best approach is to merge both prayer and medicine. Many have do so today.