1 Peter 3:7

"Husbands, in the same way be considerate as you live with your wives, and treat them with respect as the weaker partner and as heirs with you of the gracious gift of life, so that nothing will hinder your prayers." NIV translation

Now, Peter turns to being holy as a husband and tells us to be considerate. That means doing what is best for her and showing her respect. He reminds us that our wives are a weaker part but they are also heirs with us in Christ and so deserve that respect. Then, he gives us a reason for treating our wives properly and that is so that our prayers will not be hindered.

1 Peter 3:8 & 9

"Finally, all of you, live in harmony with one another; be sympathetic, love as brothers, be compassionate and humble. Do not repay evil with evil or insult with insult, but with blessing, because to this you were called so that you may inherit a blessing." NIV translation

Now, Peter tells us how to demonstrate holiness in our other relationships. The first thing is to live in peace (do not argue with others). We, as Christians, are to simply share God's word; it is not our job to condemn or to convince. We simply share what God says and trust Him to change people's hearts. We are to put ourselves in other people's shoes and to remember that we all need the grace and mercy of God. Even when we are persecuted, we are to bless our persecutors and remember our inheritance which is eternal life. Jesus told us that we would go through what He went through and so we are to expect evil and insult but we will also be resurrected just as He was.