People
It is not the going out of port, but the coming in, that determines the success of the voyage.
— Henry Ward Beecher

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker uses a voyage to distinguish beginning from completing something successfully. Leaving port is only the start; the judgment comes with arrival. Read more broadly, the comparison places value on the outcome of an undertaking, rather than treating the act of setting out as enough.
Context reviewed