I tell you, if one wants to be active, one mustn’t be afraid to do something wrong sometimes, not afraid to lapse into some mistakes. To be good — many people think that they’ll achieve it by doing no harm — and that’s a lie, and you said yourself in the past that it was a lie. That leads to stagnation, to mediocrity.
Source:Letter To Theo van Gogh. Nuenen (October 2, 1884)