"People often argue that this doctrine of divine election and choice leaves no place for evangelism, for preaching the gospel, for urging people to repent and to believe, and for the use of arguments and persuasions in doing so. But there is no contradiction here any more than there is in saying that since it is God that gives us the crops of corn in the autumn, therefore the farmer need not plough and harrow and sow; the answer to which is that God has ordained both. God has chosen to call out His people by means of evangelism and the preaching of the Word. He ordains the means as well as the end."
~Martyn Lloyd-Jones (Ephesians-God's Ultimate Purpose)