"Two physiologists in the 1970s, John and Beatrice Lacey, conducted a study and found that the brain sent messages to the heart, but the heart did not automatically obey the messages. Sometimes the heart sped up, while at other times it slowed down, indicating that the heart itself has its own type of intelligence. The brain receives signals from the heart through the brain's amygdala, thalamus and cortex. The amygdala relates to emotions, while the cortex or the neocortex relates to learning or reasoning. Although this interaction is something that is not fully understood from a physiological point of view, we do know that the heart is an extremely sophisticated organ with secrets still veiled from us."

from, Purification of the Heart ISBN: I 929694-15-6

Perhaps this explains why our hearts sometimes fail to reason with our logical minds.