The Tao is a fundamental idea in most Chinese philosophical schools; in Taoism, however, it denotes the principle that is the source, pattern and substance of everything that exists.
Hail abuse at them, call them all kinds of names under the sun and demand they buy you another drink, in fact make that two drinks! You grit your teeth and sigh heavily before taking a deep breathe and shrugging it off. Losing your temper over this would be a little over the top.
This phrase means one must be careful when appointing a guardian, and make sure someone is watching them as well. Quem vigia os vigilantes? O que os vigilantes vigiam? Até que os vigilantes venham Vigilantes odeiam outros vigilantes Escolha a tradução mais próxima da frase latina acima.