1. According to verse 3, what kind of love has the Father bestowed upon us, and what does it mean to be called the sons of God?
  2. In verse 2, what is the hope that we have as sons of God, and how does it relate to Jesus' future appearance?
  3. How does the hope of being like Jesus impact our present behavior, as mentioned in verse 3?
  4. What is the connection between committing sin and transgressing the law, as stated in verse 4?
  5. Why was the Son of God manifested, according to verse 5, and what does this tell us about His nature?
  6. What does it mean to abide in Jesus, and how does it relate to sin, as mentioned in verse 6?
  7. How does doing righteousness relate to being righteous, as described in verse 7?
  8. What is the origin of sin, and why was the Son of God manifested, according to verse 8?
  9. What is the nature of those who are born of God, and how does it impact their ability to sin, as mentioned in verse 9?
  10. How can we discern the children of God from the children of the devil, according to verse 10?
  11. What is the message that we have heard from the beginning, and why is it important to love one another, as stated in verse 11?
  12. What is the contrast between the example of Cain and the importance of loving our brother, as mentioned in verses 12-13?
  13. How does loving our brother impact our spiritual state, as described in verses 14-15?
  14. How does Jesus' sacrifice demonstrate God's love for us, and what should be our response, according to verse 16?
  15. How does our treatment of those in need reflect the love of God within us, as mentioned in verse 17?
  16. What is the difference between loving in word and loving in deed and truth, as stated in verse 18?
  17. How does abiding in truth relate to assurance before God, as mentioned in verse 19?
  18. What is the significance of a clear conscience before God, as described in verses 20-21?
  19. What is the connection between keeping God's commandments and receiving from Him, as mentioned in verse 22?
  20. What is the essence of God's commandment, and how does it relate to belief and love, as stated in verse 23?
  21. How does abiding in Jesus and having the Spirit impact our understanding of His presence within us, as mentioned in verse 24?

These questions can help explore the themes of God's love, our identity as sons of God, the impact of hope, the nature of sin, the work of the Son of God, the distinction between the children of God and the devil, the importance of love, the example of Cain, the consequences of hatred, the demonstration of God's love, the nature of true love, assurance before God, the impact of a clear conscience, and the connection between obedience and receiving from God.