The author of the article notes that Heidegger, in the period of the development of his project of fundamental ontology, understood philosophy as a science. In this context, he posed the question of the compatibility of philosophy as science and as personal philosophizing. This problem is interpreted here in the context of Heidegger’s distinction between the logical and the existential concepts of science. The article’s author believes that the switch from latent philosophizing to an explicit philosophizing and then to the scientific character of philosophy is connected to the resoluteness to objectivation of being in its difference from that-which-is.