Deference and intimacy live far apart. [ Moliere ]

Whosoever formeth an intimacy with the enemies of his friends, does so to injure the latter.
O wise man! wash your hands of that friend who associates with your enemies. [ Saadi ]

Friendship requires a steady, constant, and unchangeable character, a person that is uniform in his intimacy. [ Plutarch ]

Those who are unacquainted with the world take pleasure in the intimacy of great men; those who are wiser dread the consequences. [ Horace ]

He that can enjoy the intimacy of the great, and on no occasion disgust them by familiarity, or disgrace himself by servility, proves that he is as perfect a gentleman by nature as his companions are by rank. [ Colton ]