95% is self-belief.
Self-esteem is pretty stable but self-belief changes and defines someone character.
Self belief in believing in yourself and feeling capable. Ones you reach an optimal level of self-belief (Not self confident or over confidence), you will notice you life will become a lot easier, goals will be easier to reach and everything will start falling in place.
Having self-belief is important to copying and thriving under stress. In our lives, we face many stressful situation caused by problems in school, work, friendships or other factors. When you have strong self-belief those problems are nothing more than check box you need to tick-off before moving on.
You will always have a better chance influencing and persuading others. Self-belief and positive attitude, goes hand in hand. It helps you reduce negative thoughts, decrease anxiety and make you more fearless. Fearless is very important characters. When you believe in yourself and believe what you are doing is right, being fearless comes natural.
Use of Secret Weapon.
On another unrelated topic, always have a secret weapons. Its always good to be open and transparent but when it comes winning battles and wars, you need to keep a secret weapons just in case you need to use it. It's like playing a hand of poker, always keep your hands hidden until the end. Majority of the players will leave mid way. If you can win without using your weapon than you should do that. Never expose it. Never let anyone see it - hence the name secret weapons. A secret weapons enhances your self-belief.
Amar Gandhi, 28