It's not primarily out of a compassion for man that we share our faith - it's first of all love for God. We should never be Christian humanists, taking Jesus to poor sinful man and reducing Him to some kind of product that will better the lot of mankind. When you do open your mouth to testify to others as a love response to God, you'll be amazed at the change that comes in your feelings and emotions. This brings us to the second point. Christ Controls Us.
Evangelism involves a strategy of both saturation and penetration.
A great many opportunities to share the Lord are a result of contact with our acquaintances in our work, school, or neighborhood. Unsaved family members are also an important opportunity and responsibility, but we must press beyond the frontiers of routine contact. There are millions who will never be reached unless we take our courage in hand and share with a stranger. Some of the most dramatic and rewarding experiences that I've had in ministry have been a result of approaching a stranger with the Gospel. There's even a time when we should organize in a militant way and set aside time for a planned outreach.