The timing of God is a repeated testing that many believers do not succeed in passing. Christians are unconsciously driven by formulas - we believe that is we do what we think is our part, then God is obliged to make similarly predictable corresponding moves in a timing which makes sense to us. When God does not do what we desire Him to do within the timeframe we believe is best, we can experience weariness, frustration, and a crisis of faith. In the Old Testament, Isaac was a simple man seeking to do the right thing. He was much more of a worker than a worshiper. God blessed the work of his hands, but also allowed much conflict and strife to find Isaac. It seemed that the enemy would not leave this dutiful man of faith alone. This message reveals how endurance turned Isaac from a hard worker into a genuine worshiper. God employed a formula, but it looked nothing like what Isaac thought. In the end, his heart was powerfully changed.