As Socrates the Greek philosopher said, ‘know thyself’.

Knowledge is more powerful than physical strength and no great work can be done without knowledge.  Knowledge is a powerful factor that empowers people and achieves great results. The more knowledge a person gains, the more powerful he or she becomes.
Self knowledge is important because it helps you to understand yourself better, through better understanding, you are more able to be in control of your own life, you can then make life happen for you rather than have life happen to you.

The benefits of self-knowledge

Happiness, You will be happier when you can express who you are and to understand your desires, when you achieve this it is more likely that you will get what you want out of life.

Less inner conflict, When your outside actions are in accordance with your inside feelings and values, you will experience less inner conflict.

Self control, when you know yourself, you know what motivates you to develop good habits and stay away from bad ones.

Better decision-making. When you know yourself, you are able to make better choices about everything, from small decisions like which clothes to buy or bigger decisions, on which partner you would like to spend the rest of your life with.

When you are more grounded you are less likely to say yes when you mean no,

Tolerance and understanding of others, your awareness of your own weakness or eccentricity and struggles can help you empathize with others.

Vitality and pleasure, being who you truly are helps you feel more alive and makes your experience of life, richer, larger and more exciting.

The building blocks of self are what are known as the vitals, values, interests, temperament, around the clock activities, life mission and meaningful goals.

Values: such as helping others, being creative, health.

Interests: what concerns you, what do you pay attention to, what are you curious about.

Temperament: Do you get your energy from being alone? an introvert?
Are you an extrovert? A planner? or a go with the flow type of a person? do you make decisions more on fact or emotions? Do you prefer details or big ideas? Knowing details like this could help you to gravitate towards situations that enhance you and to stay away from un-empowering situations.

Going against the grain of your own personality is not a good idea.

Around the clock activities: Are you a morning person or a night person? what time of the day does your energy peak? If you schedule your activities to when you are at your best, your are respecting your innate biology.

Life mission and meaningful goals: What have been the most meaningful events of your life? You may discover clues to your hidden identity, to your career, and to life satisfaction.

Strengths: knowing your strengths is one of the foundations of self confidence, not being able to acknowledge your own superpowers could put you on the path of low self-esteem.
Become a person who takes in the good, listens out for compliments on what they are good at, works at enhancing them, acknowledge your weaknesses and helps you be honest with yourself at what you are not good at. You might decide to work on those weaknesses or make them a smaller part of your personal career life.

Being true to you: Acting on self knowledge will give you energy and save you energy, you will feel freer and stronger, because you will no longer conform to how you should feel, think or act, You will feel confident in the person you are and you will create the reality to reflect this