I have seen that in order to quantize a field there is a need to establish commutation relation (or anti-commutation relations). I am wonder how does that in a sense quantize something. I feel as though I dont have a good grasp of how it works. The only thing that seems apparent is that this is going from numbers to operators (such as momentum becoming an operator when you go from classical mechanics to quantum mechanics). Thanks to anyone in advance who can elaborate on this.