The Heart and the Ego-mind both have a way of saying "yes" and "no". But whereas when the Heart is speaking "yes" or "no" it is a voice of unconditional love, when the Ego-mind has the saying it is a voice of fear speaking. This is why, if you are deciding intuitively what is right for you even your "no" is of positive power because whatever is being done in the name of love is ultimately positive. Whereas both "yes" and "no" are negative forces if they are being motivated by the Ego's fear of extinction/loss/loneliness.