Hebrews 12:14-15(New Century Version)
14 Try to live in peace with all people, and try to live free from sin. Anyone whose life is not holy will never see the Lord.15 Be careful that no one fails to receive God's grace and begins to cause trouble among you. A person like that can ruin many of you.
One of the saddest things about Christianity today is that many people have a bad impression about Christians. Non-believers have been soured by how many who claim the faith behave. These behaviors that turn others off fall into two groups.
The first group, although they have been saved by Jesus Christ, continue to behave as if their conversion has made no change in their lives. They still cling to the things of the world and they treat others just as they did prior to knowing Jesus. Their behavior is marked by doing the exact things thas those around them. Non-believers question why they should embrace faith in Jesus if it doesn't make a difference in their lives.
The second group have changed their lives because of their desire to please God, but they exhibit that change by excluding others. Their behavior is one of legalism, and they set a bar that new believer have to reach to become Christ followers. They further exacerbate this charachteristic by them judging others with a "holier than though" attitude. Non-believers are turned off, because they feel that all Christians do is point out their faults.
In the Book of Hebrews, the apostle Paul admonishes us to live at peace with everyone, meaning that we need to seek peace in any human interaction we have. We then need to try to live holy lives, seeking to be good witnesses of the change Jesus has made our lives. And most importantly, we need to be sure that we show the same "grace" that God showed to us in drawing us to Christ.
We all are sinners and we all deserve God's judgement. Who are we to criticize others who have not yet found Jesus Christ? Instead we need to lead lives that reflect the love of Jesus, and attract others to the faith through "right" living, love, and acceptance. Our outward witness of our inward change is the most important thing in drawing others to Christ. Make sure that your witness as a Christian is one that will win others to Jesus.
Photo from Lost Sheeo Finders' Digest