People's Ignorance of God Leads to Doubting the Gospel

Some people are so ignorant about the things concerning God that they are depend on other people's opinions. Consequently, they have doubts about the Gospel as soon as they see that it is not received by the world...it is a false and ungodly assertion that nobody is drawn unless they are prepared to be drawn, as if a person could make himself obey God through his own efforts.

John Calvin from his commentary on the Gospel of John.