God is deadly serious about his purpose. In Isaiah 45-46 he speaks candidly of his determination to do all that he pleases - with or without the co-operation of his people. He will use the people he sees fit - even people who do not acknowledge him. His message to his people is clear: I am about my business and it will get done - and you should keep that in mind and not let other things get in the way of you being part of that. Only when we properly understand God’s purpose and how he feels about it, can we line up our own sense of purposefulness with his.