77 Before it could be completely successful the dialogue of salvation had normally to begin in small things. It progressed gradually step by step. (54) Our dialogue too must take cognizance of the slowness of human and historical development, and wait for the hour when God may make it effective. We should not however on that account postpone until tomorrow what we can accomplish today. We should be eager for the opportune moment and sense the preciousness of time. (55) Today, every day, should see a renewal of our dialogue. We, rather than those to whom it is directed, should take the initiative. Dialogue As A Method
Source: Ecclesiam Suam (Vatican.va)