People
That life is worth living is the most necessary of assumptions and, were it not assumed, the most impossible of conclusions.
— George Santayana

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The statement makes life's worth both a necessary starting assumption and an impossible conclusion without that starting point. Its paradox concerns how belief supports reasoning. Meaning is presented as something a person begins from, rather than something that can easily be established afterward.
Context reviewed