Swami Vivekananda's thought on personality:
Swami Vivekananda has great thoughts on Personality and Education. Swami Vivekananda says, "If you want to judge the personality of any person see the small things in that person." Any single achievement can be possible accidentally also, but that small things only really matters.
Swami Vivekananda says," If you want to develop your personality, it will not start from external but from deeper, and that is mind."
External appearance is just fringes of our personality. So personality development starts from the mind, not from the body.
Swami Vivekananda's view on education:
"We want the education by which character is formed, the strength of mind is increased, the intellect is expanded and by which one can stand on one's feet."
Conclusion: How you behave, feel and think is entirely dependent on the state of mind, so personality development starts from deeper, and that is mind.