Shepherd the flock of God which is among you, exercising the oversight, not under compulsion, but voluntarily, not for dishonest gain, but willingly;
First, he should serve willingly as opposed to grudgingly (cf. 2 Corinthians 9:7). God wants us to perform any service for Him willingly. Elders should not serve because they feel they must do so because of external pressure but because they desire to serve God.