A large number of academics are not aware of scientific limits. It is forgotten that scientific experiences are not able to provide evidence about the condition of human existence, his liberty. According to Kant, it was first Heidegger and his theory of existence that took up the reflection on human liberty. According to Heidegger, liberty is to equate with the fact that only humans are enabled to understand their possible destiny through a radical questioning of themselves and because of that they can organize their life. The contribution attempts to demonstrate what this means for the law by re-establishing natural right and human rights.