In essence, it means undertaking any action while calmly accepting that the outcome isn’t entirely under your control. We learn from Seneca and others that it could take the form of a caveat, such as “Fate permitting,” “God willing,” or “If nothing prevents me.” It implies that one is taking action while excluding something: assumptions regarding the eventual outcome, particularly any expectations of success. We say “reserve clause,” incidentally, because our expectations are reserved for what is within our sphere of control.