A recent post by Rabbi Mordechai Torczyner reminded me of a great story:

There was a young student who one day began contemplating the conundrum of Divine Foreknowledge versus Free Will. The more he thought about it. the more distressed he became - after all, how was it possible that he could have any choice at all, if God supposedly knows everything that will happen, as a matter of fact, makes it happen?

Unable to wrap his head around this ages-old paradox, he began slipping in his faith in an omniscient God. "If we have free will," he reasoned, "then God must not really know what our thoughts are. But if that's the case, then can God really be all that powerful?" His friends and relatives saw how this preoccupation was affecting the youth, and so they suggested that he go see Reb Pinchas of Koretz, the chasidic master, and pose the question to him: Does God know what Man thinks?

After a long trip, the young man - not one prone to visiting those of the chasidic persuasion - reached Reb Pinchas' home. When he entered the study Reb Pinchas was learning Torah, and he looked up at the student with his penetrating gaze. "Reb Yid!" exclaimed Reb Pinchas, "if I can tell what you're thinking, wouldn't you agree that the Holy One, Blessed Is He can obviously do the same?"