But what do you think? There was a man who had two sons. He went to the first one and said, ‘Son, go and work today in the vineyard.’ — Matthew 21:28

"Son, go and work today in the vineyard". You're no longer a slave but a Son, and sons work in the family business. Present yourselves to God as instruments for righteousness and be holy in all your conduct. Be steadfast and immovable, always abounding in the work of the Lord — your labor is not in vain.