"One could call [love] a friendship run mad" "does a foul passion come from the more honourable cause?" - idea that love leads to lust and can go against stoicism unless controlled

"Friendship is to be cultivated for its own sake" "not attracted to it by desire for gain" - stoic. Friendship (and by association relationships in general) should not be affected by the passions of lust or need for material possessions.

"One who seeks friendship for favourable occasions strips it of all it's nobility" using love as a means to an end such as social status (which was often the use of marriage) is wrong and not moral

"Not without hope of mutual affection": love is something which not only entails us desiring others but wishing to be desired in turn

‘Desirous of friendship’

‘Natural promptings, and not his own selfish needs, draw him into friendships’

"What could be more pleasant than to be so dear to a wife that because of this you become dearer to yourself?"

"He who does not value his wife, or his friend, highly enough to linger in life - he who only persists in dying - is a voluptuary."

"Hence my dear Paulina is able to make me responsible, not only for her fears, but also for my own."