Srila Bhaktisiddhanta Sarasvati Thakura wrote in Shri Chaitanya’s Teachings (pgs. 22-23):

“Worldly people possess a double nature. They express one kind of sentiment but internally cherish a different purpose. Moreover they want to advertise this duplicity as a mark of liberalism or love of harmony. Those who are unwilling to show any duplicity, wish to be frank and straightforward, or in other words exercise unambiguously the function of the soul; such really sincere persons are called sectarian and orthodox by those who practise duplicity.”

“We will cultivate the society only of those who are straightforward.We will not keep company with anyone who is not so. We must by all means avoid bad company. We are advised to keep at a distance of a hundred cubits from animals of the horned species. We should observe similar caution in regard to all insincere persons.”