Since time immemorial there has been an attempt to separate being, life, from consciousness and, therefore, to separate the work of transformation of movement-material-material-space-time, from the ideas and concepts with which we express the knowledge provided by experience as a reflection, in our brains, of life itself.With these notes I intend to show how the history of thought is nothing more than the reflection of the development of the activities with which we transform the reality that has been given to us to live, it is the history of life itself.