UltimateUnknown on 09 May 2012
Think about it this way, God knows every possible permutation of your actions that could take place at a given time and the ultimate outcome of it on your surroundings (universe) and your ultimate fate (heaven or hell). So at this instant me moving my hand typing on the keyboard changed some aspect of my future in comparison to if I hadn't chosen to type on the keyboard.
What free will allows us to do is choose the permutation that we want to go down upon, while God knows every possible event that could have transpired at that given time. If we had a sealed fate then a criminal could just say that God made him do the crime, while he had the choice to not do it.
