Since Calvinists believe that everyone is either predestined to be with the Lord or predestined for the Lake Of Fire, they really have no reason to obey this command by our Lord:
and then echoed by the Apostle Paul:
If you don't have a sense of urgency about lost souls, you must believe that 'the Lord has everything under control'.
To believe that 'the Lord has everything under control' is the very definition of Calvinism.
What's wrong with Calvinism?
→ The nonchalant attitude that it engenders regarding the Gospel.
→ A sense of fatalism
→ A feeling of irresponsibility
→ A total lack of the kind of faith our Lord taught
But it is comforting to think that it's all going to work out because the Lord is pulling all the strings.
→ But Calvinism is really a Big Lie producing a false sense of comfort ←