I embark on a Spanish course and become a proficient speaker. However,
I am not yet fluent, I have to concentrate hard to get it right
and am aware of my limitations. I am at a level of Conscious
Competence.
Finally, after many years of learning and practise I become fluent
in Spanish, start to think in Spanish and even dream in Spanish.
Speaking a foreign language becomes second nature to me and I no
longer have to concentrate hard on the formation of the language.
I have reached the level of Unconscious Competence.
Think of some other learning scenarios and see how these steps apply.