In this text, the Lord again warns us to be alert to the end. This end is either our own personal end, death, or the end of everthing which is a constant theme in his preaching. Matthew 24:13. (cf. eg. Matthew 10:22; Matthew 13:40; Matthew 24:1-14; Matthew 28:19-21.)
1.Lk 12:36 Be "like men waiting for their master to return from a wedding banquet..." The master's return is his coming to you for judgement, an accounting. (Matthew 12:35-37; Romans 14:12; Hebrews 4:13.)The wedding banquet is an image he uses often. (See Matthew 25:10; Matt. 22:1-14.)
2. To give a contemporary example that may convey the Lord's idea, suppose you had a building and hired a security guard to watch it for you after hours. Suppose you came late, even after midnight and found the guard on duty watching alertly. How would you react? Most of us would probably say "good, he can keep his job" and go home. But the Lord says if you were like him, you would be so pleased you would make the man breakfast. He does this to show that God's response is much greater than ours, more generous, even if we only do what is expected. In this He turns the normal way of things upside down.