If the ethical – that is, social morality – is the highest ... then no categories are needed other than the Greek philosophical categories. - Søren Kierkegaard

Zealousness to learn from life is seldom found, but all the more frequently a desire, inclination, and reciprocal haste to be deceived by life. Undaunted, people do not seem to have a Socratic fear of being deceived, for the voice of God is always a whisper, while the demand of the age is a thousand-tongued rumor, not an all-powerful call that creates great men but a stirring in the offal that creates confused pates, an abracadabra that produces after its kind as is the case with all production. Even less do people seem to have above all a Socratic fear of being deceived by themselves, do not seem to be the least aware that if the self-deceived are the most miserable of all, then among these, again, the most miserable are those who are presumptuously deceived by themselves in contrast to those who are piously deceived.

A human being is spirit. But what is spirit? Spirit is the self. But what is the self? The self is a relation that relates itself to itself or is the relation's relating itself to itself in the relation; the self is not the relation but is the relation's relating itself to itself. A human being is a synthesis of the infinite and the finite, of the temporal and the eternal, of freedom and necessity, in short, a synthesis. A synthesis is a relation between two. Considered in this way a human being is still not a self.... In the relation between two, the relation is the third as a negative unity, and the two relate to the relation and in the relation to the relation; thus under the qualification of the psychical the relation between the psychical and the physical is a relation. If, however, the relation relates itself to itself, this relation is the positive third, and this is the self.

He fixed his definition thus: reflection is the possibility of the relation, consciousness is the relation, the first form of which is contradiction. He soon noted that, as a result, the categories of reflection are always dichotomous. For example ideality and reality, soul and body, to recognize – the true, to will – the good, to love – the beautiful, God and the world, and so on, these are categories of reflection. In reflection, these touch each other in such a way that a relation becomes possible. The categories of consciousness, on the other hand, are trichotomous, as language itself indicates, for when I say I am conscious of this, I mention a trinity. Consciousness is mind and spirit, and the remarkable thing is that when in the world of mind or spirit one is divided, it always becomes three and never two. Consciousness, therefore, presupposes reflection. If this were not true it would be impossible to explain doubt. True, language seems to contest this, since in most languages, as far as he knew, the word ‘doubt’ is etymologically related to the word ‘two’. Yet in his opinion this only indicated the presupposition of doubt, especially because it was clear to him that as soon as I, as spirit, become two, I am eo ipso three. If there were nothing but dichotomies, doubt would not exist, for the possibility of doubt lies precisely in that third which places the two in relation to each other. One cannot therefore say that reflection produces doubt, unless one expressed oneself backwards; one must say that doubt presupposes reflection, though not in a temporal sense. Doubt arises through a relation between two, but for this to take place the two must exist, although doubt, as a higher expression, comes before rather than afterwards."