In the forward to, John Calvin: A Heart for Devotion, Doctrine, & Doxology, Iain H. Murray writes,

Our example needs to be the best argument that belief in divine sovereignty does not weaken evangelistic preaching.  There are prominent exceptions to the contrary—the names of some of them will be found in these pages—but in surveying the Christian scene at large, there is some justification for the idea that Calvinistic belief hinders evangelistic passion.  Facing this perception, we would be mistaken to suppose we are free of blame.  We have found it easier to be “teachers” and “defenders” of the truth than to be evangelists who are willing to die that men might be converted.  Sometimes the impression can be given to other Christians that we regard “Calvinism” as co-terminus with Christianity and that we think all gospel preaching can be fitted into the five points.  The five points are not to be depreciated, but God is incomprehensibly greater than our understanding, and there are other truths to be preached far beyond our capacity to harmonize.