The phrase "unbelieving world" refers to a world where many people do not have faith or do not believe in certain things, usually related to religion or spirituality. Full definition
The most ironic is that when they listen in on our conversation with an unbelieving world and discover that our community is overflowing with people so far from God that they normally wouldn't darken the doors of a church — and they conclude we must be emergent. (relevantmagazine.com)
This may seem to be most relevant to those Christians with the talent and the inclination to create art that speaks to the unbelieving world. (relevantmagazine.com)