How can believers serve God according to this teaching?

The sermon teaches that service to God is an outflow of His grace in our lives, as illustrated by Peter's mother-in-law who, upon being healed, immediately served those around her. Believers are encouraged to engage in acts of kindness and service to others, which is seen as serving Christ Himself. The ultimate service, however, is to bring the lost to hear the gospel, as it is the means through which they can receive spiritual healing. This active involvement in evangelism is not merely duty but a response to the love and grace that believers have received from the Lord.