If you want to keep the knowledge for yourself in an esoteric manner, you will not help Humanity because only the exoteric knowledge is able to support its evolution. So the idea is to give to the others what you get. This is the diffusion of knowledge. And this point is fundamental for the network of Humanity.  Your freedom is useless for Mankind if you don’t liberate the others from the bounds of darkness. Humanity needs light and essence. This means that diffusion of knowledge is a necessity, a condition sine qua non for the evolution of Humanity. In that sense knowledge has to be taught in an open way.