God ordains all things but humans actions are not necessary. God ordains all things but humans are responsible for their choices.
As a matter of fact, according to a Reformed theological context, we simply do not have the option of arguing for essential change in God. Nor do we have the option of arguing that God's control over creation is such that the decisions and actions that his human creatures take are all related to his decree in such a way as to be absolutely necessary. Nor do we have the option of maintaining that, since God ordains whatever comes to pass, our decisions and actions are not free or responsible. (Oliphint, K. Scott. Reasons [for Faith]: Philosophy in the Service of Theology. Phillipsburg, NJ: P&R Pub., 2006. Print. 303)