It always seems impossible until it's done.

An inspiring quote curated by QuickQuoteMaker.

Mandela's authority on this point is not rhetorical. He spent twenty-seven years in prison before negotiating the end of apartheid and becoming president of the country that had jailed him — an outcome that virtually every observer had considered impossible.

The sentence describes a distortion of judgement rather than an inspirational rule. Impossibility is often a statement about the current state of evidence, not about the task. It survives only until someone completes the work, after which the same outcome is quickly rewritten as having been inevitable.