I would like to focus primarily on v.28 and take a look at what elders of a church are to maintain as priorities in their Christian leadership role.
"Therefore take heed to yourselves.." Shepherds of the flock of God, must be the best examples they can be. Not that any who are in the role of Christian leadership are perfect, but one must strive to be the best they can be. That in itself, is an example that must be displayed before the congregation.
.."and to all the flock among which the Holy Spirit has made you overseers.." To a Shepherd, each one of his sheep is important. A shepherd has to be among his sheep, so he can know what the needs are, and attend to them. I had an elder of a church I was serving tell me. "that visiting members of the congregation would be the most important work I would do." Not to minimize the teaching and preaching of the Word of God. But you will not know how to apply God's Word, if you are not among the people, and know what those needs are.
"..to shepherd the church of God which He purchased with His own blood." Elders of a church must remember that the church they are responsible for, belongs to the Lord Jesus Christ. He purchased the church with His own blood. Does the church mean a lot to the Lord Jesus Christ? Indeed it does! The Lord is counting on the elders to watch over His church.
When I was growing up, whenever a stranger came to our door, my father would meet him at the door. Why? Because my father was the protector of our family. He was provider and protector. The elders are no different. It is a great responsibility, but also a great reward to care for such a wonderful community. The family of God! GP
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