"If that is your belief and it is the New Testament position, then you would be heartless to not be trying your hardest to convert people."
I am trying my hardest. My entire life exists to help show people the love of God and the eternal life they can have through him.
What is in question is the methods we employ to do so. I believe this happens best in the context of meaningful relationships. I don't expect people who don't believe in God to follow God's path for their life.
"Once you become knowledgeable, you have an obligation to do something about it."- Ron Paul