People
Whoso neglects learning in his youth, loses the past and is dead for the future.
— Euripides

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The warning gives neglected learning two costs: losing touch with what came before and losing the ability to take part in what comes next. Calling someone 'dead for the future' makes that fear deliberately stark, presenting education as a connection across generations.
Context reviewed