If you are sad, it is because you are thinking sad thoughts. If you are happy, it is because you are thinking happy thoughts. Your emotions respond to what you are thinking. And many times what you are thinking isn't even real, but your emotions do not know the difference between reality and fantasy. Which is why it is a dangerous thing to live guided by your emotions.
we have two systems, factual or information memory and emotional memory.
People with various disorders can show they remember emotions connected with a person or
situation but not the facts.
And some extreme illnesses it is the emotion which seeks for a rational explanation as to
why you are feeling something. People will invent a logical link even when one does not
exist.
So both our emotions and our intellect work together and we can choose combinations
of these things to achieve objectives.
What is often a mistake is to ignore either ingredient, because both are always present,
it is just denying ones own actual realities, which leads to unhealthy delusions and tensions.
A classic example is if someone is in a terrible marriage, they sometimes have to get out
of the situation to realise its real value before everything is destroyed beyond repair.
In spiritual terms, being angry with a situation is fine, you can begin to work through it,
but faking where you are, denies everything and you loose touch with the truth.
So much of our faith is grounded on our experience and fine decisions about love, hate,
good, bad, happy, sad, knowing the presence of God and His blessing or being completely
blank. Most of our lives would be empty without this emotional adventure.