156 What has so far been achieved is insufficient compared with what needs to be done; all men must realize that. Every day provides a more important, a more fitting enterprise to which they must turn their hands—industry, trade unions, professional organizations, insurance, cultural institutions, the law, politics, medical and recreational facilities, and other such activities. The age in which we live needs all these things. It is an age in which men, having discovered the atom and achieved the breakthrough into outer space, are now exploring other avenues, leading to almost limitless horizons.
Source: Pacem in Terris (Vatican.va)