Many people assume that we can separate emotions from thoughts and decisions, but to do so, can only lead one to the wrong decisions, decisions these made under the effect of the subconscious mind, and therefore being unconscious decisions.
Recent research in Psychiatry has been showing us how emotions (or empathy) and thoughts are deeply interrelated, and to a point in which they actually determine them. One’s emotional wellbeing can and does, in fact, determines the ability to make good decisions in life. And so, we can actually say that emotional intelligence can directly affect cognitive intelligence.
One can't simply analyze life or anything it might include while ignoring the emotions behind the beliefs, delusions, fears and ambitions.