Congestion comes when a person is set in his interest. If his family causes a man to be so absorbed in his pride and interest in it that nobody else in the world exists for him except his own people, or when a person thinks of his own nation alone - nothing else interests him, others do not exist for him - in this case his family pride or his patriotism becomes a veil over his eyes, blinding him so as to make him unable to serve either others or his own.