Witness or Giving Witness?

Pope Benedict XVI reminded the young people at World Youth Day in Sydney, Australia in 2008, that we are being called to witness to a “divided and fragmented world.”  He explained that the way to approach the world is the same way the apostles did when Jesus was with them.  So like the apostles, how can we use the gifts of the Holy Spirit to share and witness to our Catholic faith in our everyday life?  How does the way we act and treat others also serve as a witness that we are disciples of Christ?