70 Venerable Brethren, you are well aware that almost the whole human race is today allowing itself to be driven into two opposing camps, for Christ or against Christ. The human race is involved today in a supreme crisis, which will issue in its salvation by Christ, or in its dire destruction. The preachers of the Gospel are using their talents and energy to extend the Kingdom of Christ; but there are other preachers who, since they profess materialism and reject all hope of eternal happiness, are trying to drag men down to an abject condition.
Source: Evangelii Praecones (Vatican.va)