Matthew 10:33 - but whoever denies me before men, I also will deny before my Father who is in heaven.
Part of conversion is counting the cost of following Christ and being willing to pay it.
True, of course. But you'll remember that early Christians met in the catacombs and used a fish symbol as a code because of the physical danger involved in being a Christian in early Rome. Once discovered they were quite valiant in facing torture and death, they did evangelize, but they did also try to avoid discovery by the people who would kill them.