When the Magid initially came to the Besht for Sabbath to become acquainted with his way he was not very impressed by his Kabbalistic [knowledge] and behavior. On the Sabbath, he decided to test him. The test was [as follows]: he will think about a difficult Tosefot; he wanted to see whether the Besht would sense it.
At the third meal [shalosh se’udot] the Besht began a discussion on the topic of that Tosefot.
From then on the Magid became one of the most fervent followers of the Besht.
I.F.
P. Landau
