“My friend...care for your psyche...know thyself, for once we know ourselves, we may learn how to care for ourselves."― Socrates
What does it mean to “know thyself”?
I think it means self-awareness. To know yourself is to be self-aware: to know what you want from life, what your beliefs are while having confidence in each.
How do you become self-aware?
There are a lot of ways to become self-aware, but one that works well is the habit of asking yourself hard questions.
Most people live deluded lives. They shape their opinions, beliefs, and ideas based on who and what is around them. They have little wherewithal in understanding why they do, think, say or feel the things they do, think, say, and feel.
They are unaware.
There’s nothing wrong with being influenced by others. We are all influenced by others to some degree. But you should at least be aware of who and what is influencing you. This way you at least have a say in what you ultimately let influence you. This is part of becoming self-aware.
When you start asking yourself questions, you start becoming aware of yourself. You start learning who you are. Do this enough and you can literally change your life.
To know thyself is raw power. Yet few do and few try.
When you know yourself, you own who you are. This seethes confidence and assuredness. This is attractive to both sexes. People like you more. You are more persuasive. You are more effective.