He that oppresseth the poor reproacheth his Maker: but he that honoureth him hath mercy on the poor. (Proverbs 14:31)
In one of his parables Jesus compared two kinds of his professed followers. He had this to say about those that were saved: Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me. (Matthew 25:40b) On the other hand those who were lost were told: Inasmuch as ye did it not to one of the least of these, ye did it not to me. (Matthew 25:45b)
This reflects what we learn here in Proverbs: the way we can show love or disdain for God is by the way we treat the most helpless humans. A supposedly helpless person has only God to help him, and God takes responsibility for him. God commands his people to be kind to the helpless on his behalf. Even if you think you are a Christian, the Bible is clear that you will be lost if you do not care for the needy, unless you repent. However, I realise that wisdom must be exercised, but the problem is not that wisdom is exercised but rather that apathy is being exercised.
How can I help the soul rather than just the body? By giving loving care and talking about Jesus and what he has done for me. These two things are not a professional calling, they are a universal calling. I mean it's not just a few particular Christians like pastors and other paid church workers that God wants to do this work; it is every believer, including you.