“Friendship has more advantages than I can easily name.”
The value of friendship is intentionally left larger than a checklist, because companionship affects many parts of life at once.
Source details
De Amicitia, chapter 6 / classical section 22, Andrew P. Peabody translation, Project Gutenberg #7491. “Friendship has more advantages than I can easily name” introduces Laelius’ catalogue of the many uses and consolations of friendship; the open-ended praise remains rhetorical/philosophical rather than a quantified claim about relationship outcomes.