The article aims to clarify the basic laws of logic and show their application in the Gospel. The content of selected fragments of the Gospel proves that it contains fundamental laws of rational thinking in the form of: the law of identity, the law of non-contradiction, the law of the excluded middle, the law of sufficient reason, the law of finality. The statements and teachings of Jesus Christ are not without logical principles, which man already applies in everyday thinking. The source of this kind of laws is real existence. The so-called the first principles that govern the existence of being, in the order of knowledge, become the laws of thinking. For the message of revelation to be understood and accepted by the person to whom it is addressed, the laws of thought must exist in the Gospel.