Ask HN: Are drastic changes to our personality and thought process possibe?

Do you think it is possible to make changes to one's actions, behaviour, personality, mannerisms and thought process that make them unrecognizable to their past self?

I feel that i have not grown at all as a person and everything about me is the same since i was a child but i cannot continue this way. How do i go about molding myself so that my thought and cognitive processes and every other aspect of my personality is altered significantly?