"Der Wille zur Macht" (The Will to Power) is a posthumously published collection of Nietzsche's notes and unpublished writings, organized by his sister Elisabeth Förster-Nietzsche. Although Nietzsche did compile the notes and drafts titled "The Will to Power", it was not published during his lifetime. Instead, it was posthumously edited and published by his sister, Elisabeth Förster-Nietzsche, and Peter Gast in 1901. Due to the enormous size of the document, this was published in two different parts. The concept of the will to power is central to Nietzsche's philosophy and is found in nearly every single one of his works, major and minor. The Will-to-Power (Wille-zur-Macht) is a kind of "Life force" similar to the Logos of Heraclitus mentioned in the New Testament, and the Leibnizian Via Viva used in the Physics of the day. This is the driving force behind all human action and the desire for self-overcoming, a re-formulation of Schopenhauer's Will-to-Live (Wille-zum-Leben).