Even though most Christians are very familiar with the gospel, many are reluctant to share their faith because they just don't feel capable of explaining it to someone else. When we lack confidence in our knowledge of salvation through Jesus Christ, fear of negative reactions or possible questions can keep us from opening our mouths. What if we don't have the answers or end up looking like a fool? It's just too intimidating.
But remember, God has given us the most important message in the world. Since we are confronted by so many unscriptural philosophies and religious deceptions, we need to understand the gospel and be able to present it with confidence and boldness. We can't let fear or ignorance keep us from giving a lost world the only message that can change a person's eternal destiny.
The apostle Paul welcomed every opportunity to tell people about Christ, because he focused on the gospel's life-changing power rather than the negative reactions he might encounter. Oftentimes, the reason we are ashamed to talk about our faith is that we're concerned about ourselves. But if we begin to look at the hurting people around us, express genuine interest in them, and ask God to open a door for us to share our faith, He will answer that prayer.
We tend to be motivated by temporal activities that eventually fade away. But people are forever, and they need to know the Savior. Look for opportunities to reach out: notice their expressions; ask how they're doing. When their need stirs your heart, you'll be eager to offer them the gospel.