One ultimate freedom as human beings is the freedom of thought. Those who learn to control their thoughts are those who are most successful in their careers and in life.
Good thinking is a learned skill. It doesn't happen automatically.
However, you can learn to think well by understanding the relationships among your thoughts, feelings, and desires. Once you learn to separate rational thoughts from ego-centered thoughts, you are well on your way to becoming a good thinker.
Dr Tony Zeiss: Build Your Own Ladder