The article analyzes the problem of the correlation of morality and ideology. The author believes that the distinction between morality and ideology can be made only at the level of their genealogy: if ideology is a socio-cultural product, then morality is rooted in human nature, in "moral intuitions", which medieval scholastic philosophy called synderesis. In modern ethics, synderesis can be identified with the neurophysiological prerequisites of morality. Opponents of this approach argue that, firstly, it excludes free will, and secondly, it does not explain the content of moral values and norms in any way. The author of the article criticizes these statements and offers his original theory of synderesis. The article draws an analogy between ethics and intuitionistic mathematics, which considers mathematical objects as the results of intellectual construction based on initial intuitions. Ethical objects should also be considered as constructions based on innate intuitions. Moral intuitions do not exclude free will, since they rely on rationality inherent in our nature, the main property of which is the ability to make decisions regardless of external stimuli and internal states. In addition, these intuitions influence the content of our norms, as they are the "operators" of their construction and are included in the "final product".