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Specifically, in regard to both Yitzchak and Yaakov, we should mention that they both obviously recognized that there was a prima facie understanding that a prophecy should not simply be transmitted to another without being instructed to do so by God. On the other hand, this prima facie understanding of confidentiality must also be understood within the general principles of being allowed to assist another if deemed more proper. This further standard of the confidentiality of prophecy must then be understood as demanding more of an investigation of the reasons for disclosure. This must have been the issue before both Yitzchak and Yaakov. Upon this further reflection of the matter before each of them, each arrived at the conclusion each reached. This is not to say that they disagreed on the basic principles.