The article deals with the problem concerning the language of metaphysics. Metaphysics is understood as knowledge about the world as a whole. It is argued that such a perspective needs specific language tools for the description of metaphysical reality. The principal characteristic of the terms of the language aimed at describing the world metaphysically is their ultimate abstractness. It is stated that this abstractness not just corresponds but coincides with the ultimate simplicity of metaphysical reality, that is to say, the (...) reality of the world as a whole. The analysis of the ultimate reality or the absolute leads to the conclusion that both such reality and its depiction is ruled by a special logic different from what is conventionally considered to be logical. Elements of this logic are the ultimate abstractions. As it turned out, logical laws do not apply to extremely abstract objects, first of all, the law of contradiction. In the logic of the absolute, mutually exclusive statements point both to the same and not the same reality. The analysis shows that this is not the dialectical logic of contradiction and denial, it is the logic of the consistent unity and coexistence of identity and difference. The use of identities and differences in their ultimate sense allows us to determine the basic concepts of a metaphysical description – being, existence, the existing, difference, identity. Basic concepts serve as a necessary and sufficient basis for a complete metaphysical description of the entire existing, that is, the world as a whole. Going beyond the basic concepts, we, however, move from the logic of ultimate reality to the usual logic of empirical reality. (shrink)