❝Heraclitus is the tragic thinker. The problem of justice runs through his entire work. Heraclitus is the one for whom life is radically innocent and just. He understands existence on the basis of an instinct of play. He makes existence an aesthetic phenomenon rather than a moral or religious one. Thus Nietzsche opposes him point by point to Anaximander….Heraclitus denied the duality of worlds, ‘he denied being itself.’ he made an affirmation of becoming. We have to reflect for a long time to understand what it means to make an affirmation of becoming. In the first place it is doubtless to say that there is only becoming. No doubt it is also to affirm becoming. But we also affirm the being of becoming, we say that becoming affirms being or that being is affirmed in becoming. Heraclitus has tow thoughts which are like ciphers: according to one there is no being, everything is becoming; according to the other, being is the being of becoming as such. A working thought which affirms becoming and a contemplative thought which affirms the being of becoming. These two ways of thinking are inseparable, they are the thought of single element….For there is no being beyond becoming, nothing beyond multiplicity; neither multiplicity nor becoming are appearances or illusions. But neither are there multiple or eternal realities which would be in turn, like essences beyond appearance. Multiplicity is the inseparable manifestation, essential transformation and constant symptom of unity. Multiplicity is the affirmation of unity; becoming is the affirmation of being. The affirmation of becoming is itself being, the affirmation of multiplicity is itself one. Multiple affirmation is the way in which the one affirms itself. [Heraclitus] saw no negativity in becoming, he saw precisely the opposite: the double affirmation of becoming and of the being of becoming–in short the justification of being. Heraclitus is obscure because he leads us to the threshold of the obscure: what is the being of becoming? What is the being inseparable from that which is becoming? Return is the being of that which becomes. Return is the being of becoming itself, the being which is affirmed in becoming. The eternal return as law of becoming, as justice and as being.
Gilles Deleuze, Nietzsche and Philosophy