Let us not therefore decide whither we must tend, and by what path, without the advice of some experienced person who has explored the region which we are about to enter, because this journey is not subject to the same conditions as others; for in them some distinctly understood track and inquiries made of the natives make it impossible for us to go wrong, but here the most beaten and frequented tracks are those which lead us most astray. Nothing, therefore, is more important than that we should not, like sheep, follow the flock that has gone before us, and thus proceed not whither we ought, but whither the rest are going. Now nothing gets us into greater troubles than our subservience to common rumour, and our habit of thinking that those things are best which are most generally received as such, of taking many counterfeits for truly good things, and of living not by reason but by imitation of others. This is the cause of those great heaps into which men rush till they are piled one upon another. In a great crush of people, when the crowd presses upon itself, no one can fall without drawing someone else down upon him, and those who go before cause the destruction of those who follow them.