The Bible tells us that unbelievers have been blinded by Satan to the truth of God and His redemption of us through Christ. Apart from God's intervention in another person's life, our personal efforts will be ineffective in reaching others for Christ. Our part is to always be ready to share the reason for the hope we have in Christ and to be unashamed of our faith, regardless of the background of who we are speaking to. We are told to be lights to those around us and act in a way that demonstrates gentleness and respect. When we do good works to honor God and share our faith with ours, we may experience suffering as did those we read about in the New Testament.
When sharing our faith there are some things we must remember. First, we are called to pray for those who have yet to believe. Second, we must be unashamed and unafraid to share our faith in Jesus Christ with others. Third, our lives must reflect the beliefs we share. Finally, we must be willing to suffer when others oppose our message, including those from other religious backgrounds.
When sharing our faith with people involved in cults or in other religions, we may find it helpful to have somewhat of an understanding of what they believe. Satan often likes to distort the truth to lead people astray. In other religions we can see a hint of God's truth, but it is incomplete and unbiblical. Knowing where the pitfalls in a particular person's belief system lie can help us to better understand that person and to know how to better share our faith with them.
However, most importantly is that we are grounded in God’s Word, that we study and are ready to share the Truth. If we don’t know it we can’t share it. If we don’t know His Truth we won’t recognize the error of others. God’s Word is our weapon (Ephesians 6:17).
In any type of evangelism, it is important to respect the person to whom we are speaking. Our God is loving; Jesus came in grace and truth, and our approach should be the same.