Is God faithful to Christians who have fallen away?

Sophie and Peter – 1 Corinthians 1:4–9 1. What does v5 mean in terms of 'all kinds of speech and knowledge'? Was this particularly relevant for the Corinthians or to us too? (0:51) 2. In v7 why did Paul say "revealed" at the end of the verse instead of something like return? (4:20) 3. What are the spiritual gifts in 1 Cor 1:7 and how is it linked to verse 6 confirming our testimony about Christ? (7:58) 4. What does it mean for God to be faithful to a Christian who has fallen away? (11:55) 5. If I don’t feel enriched is that due to my own sin or am I not looking and open to seeing Gods riches? Or is it that I have no spiritual gifts/am not confident in my gifts? (18:18)