Sharing salvation should flow with your spirit and personality type. God reveals our personality types to us and how we are most inclined to share The Gospel.
Every person who knows Jesus can witness. It is talking at the appropriate time, to anyone who is receptive, about our relationship with God and what his Son Jesus Christ has done for us. The Holy Spirit reveals to us those who are ready.
It is not we who bring people to salvation. It is the Holy Spirit. God prepares the heart of a person to receive. If it's not the right time and God's Holy Spirit has not yet prepared that person's heart, then he/she will not accept Jesus. No amount of cajoling, pressuring, threatening and shaming that person will work. He or she will only become stubborn in spirit and be pushed further from God.
Be at peace. Work with God, not against him. Let the Holy Spirit do his work and go with God's flow in talking to people about Jesus. Witnessing should always be done in peace.
