Stages of learning

Last week I got to know a good funda regarding learning any skill. According to this, the learning of any skill happens in four phases -

1. Unconscious Incompetence - In this stage, you are not aware of the fact that you are lacking in a skill.
2. Conscious Incompetence - You progress to this stage when you realize that you lacking in the skill and you need to do something about it. In my opinion, this is the most difficult stage to overcome. Mainly because of inherent laziness to take effort for learning new skills.
3. Conscious Competence - You reach this stage by learning the skill in which you were lacking. This stage is good to be in because you are now aware that the skill is with you.
4. Unconscious Competence - I call this stage "Nirvana". This is the stage in which you are not even aware about a skill, but you are executing the skill with extreme perfection.