This reflection focuses on the phenomenon of error and mistake-making within philosophical thought. The author conceives of philosophy as an experimental discipline that inherently utilizes the method of trial and error in its progression. In contrast to the common understanding of error as an undesirable element of argumentation, here error emerges as a legitimate tool, provided it is used thoughtfully and systematically. The text distinguishes between trivial errors, which should be eliminated, and deep, fundamental errors that may remain hidden for long periods or persist despite their discovery. Special attention is given to "happy errors," which open new paths of knowledge that would otherwise remain inaccessible. Philosophy is thus viewed not as flawless deduction, but as a living process where deliberate work with error forms the essence of methodological procedure and enables deeper insight into the nature of reality. Engaging with error is constitutive for true philosophy, not merely accidental.