>personal development is the development of an individual's skills, competence, attributes, and personality through education, training, and other activities --- Personal development - Oxford Reference
The Greek philosopher Aristotle (384 BCE – 322 BCE) wrote Nicomachean Ethics, in which he defined personal development as a category of phronesis or practical wisdom, where the practice of virtues (arête) leads to eudaimonia, commonly translated as "happiness" but more accurately understood as "human flourishing" or "living well". Aristotle continues to influence the Western concept of personal development to this day, particularly in the economics of human development and in positive psychology.
Confucius and the East Asian tradition
In Chinese tradition, Confucius (around 551 BCE – 479 BCE) founded an ongoing philosophy. His ideas continue to influence family values, education and personnel management in China and East Asia. In his Great Learning Confucius wrote:
The ancients who wished to illustrate illustrious virtue throughout the kingdom first ordered well their own states. Wishing to order well their states, they first regulated their families. Wishing to regulate their families, they first cultivated their persons. Wishing to cultivate their persons, they first rectified their hearts. Wishing to rectify their hearts, they first sought to be sincere in their thoughts. Wishing to be sincere in their thoughts, they first extended to the utmost their knowledge. Such extension of knowledge lay in the investigation of things.