Assuming proper diet and training is understood.
because you cannot assume that, at all..quite the opposite in fact
working within the natural realm, you are forced to pay attention & learn tricks to growth that you WILL NOT learn if you are simply inexperienced joe blow, looking for the cheap quick "fix" in your mind of steroid use
it is a pattern of growth, of education and learning, that you undertake when stretching the bounds of natural muscle growth
and then, when you learn all this experience and knowledge, you can apply those learned skills to the platform of elevated hormonal output..
serious damage can then commence to take place
one does not go from kindergarten to high school, skipping all the steps in between, and evolve into a capable student..
they would simply not be capable of it
it takes time, experience, and growth