Humanistic psychologists focused on the importance of what?

Humanistic psychologists focused on the importance of a human self-development and fulfilling individual potential.

Explanation:

They say the possibility and tendency of self-development is immanent, natural and we all born with it. The main work of a psychologist, educator, coach etc. is to find the way theu can support other person's full development.

They differ as far as the goal of the development is concern. For some, like Carl Rogers, it is just a fulfilling the person potential as it is, for others, like existential psychologists (like Victor Frankl) is trancendenting towards something bigger that just the personal "I" - God, spirit, absolute.