* ὁ γενναῖος περὶ σοφίαν καὶ φιλίαν μάλιστα γίγνεται, ὧν τὸ μέν ἐστι νοητον ἀγαθόν, τὸ δὲ ἀθάνατον.
An alternative translation: "One who is noble in mind most of all depends upon wisdom and friendship — one is a good perceptible to the mind, thinkable, and imaginable; the other, everlasting and perpetual."
I would take that that friendship is so important, one can barely conceive of its importance.
γενναῖος "noble in mind, high-minded" From γέννα (génna, “descent, birth, origin”) + -ιος (-ios). Compare ἀγενής (agenḗs "of no family, ignoble, mean, cowardly, vile"). Think of the name Eugene "well-born, noble"
σοφίαν (sophian "skill in matters of common life. sound judgement, intelligence, practical wisdom") Remember this is also the exact element in philosophy "φιλοσοφία ".
Henry George Liddell, Robert Scott, A Greek-English Lexicon, σοφία
γίγνεται has a number of connotations including:γ. παρά τι to depend upon...
Henry George Liddell, Robert Scott, A Greek-English Lexicon, γίγνομαι
νοητος
Henry George Liddell, Robert Scott, A Greek-English Lexicon, νο-ητός
αθάνατος
Henry George Liddell, Robert Scott, A Greek-English Lexicon, ἀθα?́να^τ-ος