Rajas, Sattva and Tamas are mixed up with one another. They are attached to one another, and likewise follow one another. It is very rare that a person is found to be entirely Sattvik, Rajasik or Tamasik.
Don’t let the heart rule your mind. This is the most common advice we get when we are caught in a dilemma. This implies that the heart and the mind are in conflict and listening to your heart may weaken you. However, the ayurvedic concept of mind takes a broader and more illuminating view of the subject.