Peter tells us that we should always be ready with a response to any question about the reason for our faith. 1 Peter 3:15. Thus the reason Paul told Timothy to be diligent in his studies to rightly divide the truth 2 Timothy 2:15, because many will come and give false answers just to satisfy the itchy ears of the lost. 2 Timothy 4:1-5. So it is up to us to be prepared to help the lost find the way.
If you desire to share the Gospel, and you should, then be sure you are prepared to answer the questions that will come your way. If you cannot properly respond to a persons questions, then don't wing it. Be honest and tell them you will find the answer and get back to them. Most heresy begins with individuals who share the Word, but do not know the Word.
Probably the most asked question I get while sharing the Gospel is,
"What about those who lived in parts of the world where the Gospel was never shared?
How can they be condemned to hell if they never knew the truth?"
