Pursuing happiness in Christ together.
True happiness is rooted not in circumstances, things, or people but in one person: Jesus Christ. When we are in relationship with Jesus Christ, we find complete happiness. This is why Paul lived his life crucified with Christ and trusting in Him. The love of Christ shown in His death and resurrection is what makes us happy when circumstances may disappoint and fail us. Jesus illustrated this truth in John 15:
Healthy relationships are growing relationships. Growing relationships are connected relationships. A healthy branch has fruit growing on it. Fruit can only be grown on a branch when the branch is connected to the vine, receiving all that it needs from the vine. This is what Jesus calls discipleship and discipleship happens together. The "you" in John 15:5 addresses not one person but a community of people.
We are called to go into the world to testify to Christ's saving love. When we testify to Christ's love, it is not a choice we first made for God, but it is a response to God, who chose us to go and love one another in the world. Loving one another in a world that needs not reciprocate can be difficult, but Christ has given us a Helper who will not only help us testify to this great love, but who Himself will testify along with us. The message is clear, we are not alone in this calling. This is why the love we share with people in this world does not need reciprocation, because the Holy Spirit will help us be happy with the love that God gives to us as we fulfill this high calling.