1 Peter 3:13-17 (ESV)
Now who is there to harm you if you are zealous for what is good?  But even if you should suffer for righteousness' sake, you will be blessed. Have no fear of them, nor be troubled,  but in your hearts regard Christ the Lord as holy, always being prepared to make a defense to anyone who asks you for a reason for the hope that is in you;  yet do it with gentleness and respect, having a good conscience, so that, when you are slandered, those who revile your good behavior in Christ may be put to shame.  For it is better to suffer for doing good, if that should be God's will, than for doing evil.
But in your hearts regard Christ the Lord as holy, always being prepared to make a defense to anyone who asks you for a reason for the hope that is in you.
Do you have a reason? Do you have a reasonable reason, one that actually appeals to reason? Today so much of what is considered as evangelism is nothing but manipulation of emotions. Peter, though, talks about apologetics, defense, reason. He believes that people can be persuaded to believe. And a person can. This is actually, contrary to neo-orthodoxy, and the position adopted concerning apologetics by many even in confessional Lutheran circles, the orthodox Lutheran position. No man by himself can’t think his way into belief in Jesus Christ, that is clear. But the Holy Spirit can work on a man’s thinking capabilities to reason him into the faith with a clear presentation of the gospel. It has happened and it can happen. And there are plenty of books out there to help you develop a cognitive argument for the faith. the best are actually written by Lutherans, “The Defense Never Rests” “History and Christianity” to name just a couple. Be ready to make a defense.