“I began to realize how important it was to be an enthusiast in life. If you are interested in something, no matter what it is, go at it full speed. Embrace it with both arms, hug it, love it and above all, become passionate about it. Lukewarm is no good.”
– Roald Dahl
Passion and perseverance will give you confidence and grit for long-term goals.
Definition of grit: courage and resolve; strength of character.
More about that by Angela Lee Duckworth in this TED Talk: Grit: The Power of Passion and Perseverance