In this short book, which is a based on a sermon that Crescas probably gave on the night of Passover, he explores his opinion about some philosophical questions regarding the subject of the basis of belief in   miracles.[5]  These questions arise because of the description of the different miracles experienced by the Jews in Egypt. The first question asksif belief is an act of free will, or if the miracle in fact obliges the believer to believe in it (and in the idea that the miracle worker wants to prove through the miracle). After this question, Crescas addresses the subject of the essence of miracles, the essence of free will, and the relation between free will and reward and punishment. The sermon’s conclusion is also the only legalist work of Crescas in our possession.