Worst companions require formality

[1] The friendship that is based on love and sincerity makes a man free from ceremonial formalities, but the friendship for which formalism is necessary is unstable and such a friend is not a true friend, because true friendship requires that a friend should not be a cause of trouble for the friend. If he is a cause of trouble he will prove tedious and harmful and this harmfulness is a sign of his being the worst friend.