The theme of responsibility in the book of Ephesians is explored, emphasizing the role of the Joshua generation and the need for positive behavior. The importance of imitating God and Christ, walking in love, and being dear children of God is stressed. The concept of total surrender and sacrifice is discussed, urging believers to offer themselves as living sacrifices to God. The importance of proving God's work in one's life and the evidence to convict as a Christian is also highlighted.