In his Meditations, Descartes defended the thesis “Cogito ergo sum” ,”I think, therefore I am”, and reasoned that mind and matter are two different things. However, isn’t it the wrong order, I think, therefore I am? For if I wouldn’t be, I couldn’t think, for a non existing thinking being is impossible. Thinking is only possible for me if I exist and if this existing of me has developed that way that the existing being that I am can think. Therefore, my existing is a precondition for my thinking. For this reason it is not correct to say “Cogito ergo sum”, but rather one should say “Sum ergo cogito”, “I am, therefore I think”. But then it is not so that there is a thinking that happens to be my thinking, but my thinking is a consequence of my being as it happens to have developed. And this has consequences for my thinking, for my thinking cannot be separate of my being, as Descartes reasoned, but it is an inextricable part of my being, whatever that may involve.