The hidden growth

Growth is a positive increase in size that happens to a person, animal or plant, normally it is visible to other people around that person. But what is a hidden growth.
A hidden growth is synonymous to self development when someone developed him or her self he is making a positive increase towards the increase in size of the way he thinks, feels about things around him or reacts to things definitely this things I have just mentioned aren't visible to other people around that person. So that makes it hidden, personally I believe and have a passion for self development and I think everyone else to should because we are not all perfect but taking that your imperfection and turning it into a more perfect thing or something better than perfect, is a "hidden growth"