Philippians 4:21-23 Greet every saint in Christ Jesus. The brothers who are with me greet you. 22 All the saints greet you, especially those of Caesar's household. 23 The grace of the Lord Jesus Christ be with your spirit.
"Greet" means to spend time in warm exchange. It would be like me telling my son to "greet" my dad, mom and sisters when you go to the Twin Cities. Paul commanded the Philippian Christians to greet all the believers for him, "Greet every saint in Christ Jesus". Please note what Paul called those who are in Christ Jesus. He called them "saints". Every believer is a "saint". Saint means a person set apart for special service, a person made holy. Each person who believes that Jesus died for his sins, rose from the dead on the third day and is Lord is in Christ Jesus, set apart to serve Jesus and holy in God's sight. Every believer is also brother or sister with one another; is family.
Note that Paul served with many brothers. He had men come along with him as he carried out his assignment from God. Time with others is necessary to teach and demonstrate how to serve Jesus Christ. The family is an ideal disciple making unit. One key to a profitable disciple making unit is spending time together in work, play, eating, formal instruction, and rest. The other key to profitable disciple making unit (the family) is for Dad and Mom to spend time with the Lord to learn from so they can pass godly instruction on to the children. The Bible teaches us that both Dad and Mom are responsible for raising godly children, but that Dad is to take the lead as the God appointed spiritual leader.
Note also that Paul reached the people around him with the gospel of Christ. As he was under house arrest in Rome, he reached those in Caesar's household. We need to follow his example and reach those who have to be around us daily with the gospel of Jesus Christ. We do that effectively by speaking Jesus's words and living His life. We can do by His grace. What is grace? Grace is unmerited favor given us by God to forgive our sins and fully equip us for learning and living His life. Grace is everything we need to learn and live in accordance with God's word the Bible.
Do you see yourself as family with all believers and thus treat them as family? Do you take seriously discipling your family by spending time with the Lord and with your family daily or as often as you can? Do you know and use all the resources God has freely given you in Christ? If you can't answer yes to all the above questions, then ask God to help you and receive the help he points you to or sends to you. Ask a godly person who is living God's way to help you. The Holy Spirit will guide you into all truth.