Feelings determine our everyday life. Too often we feel at the mercy to our own feelings which seem to be taking on a life of their own. How often do you wish afterwards, you had reacted in another way or you would go through life much more relaxed. But what are these "feelings" actually?
The "Emotion" is the pure information that we experience from the physical world (grief, joy, anger, fear, etc.).
The "Feeling" is the energetic information, the strongest aspect of our conscious. Feeling "happens" when our mind interprets the input (the situation) and reacts according to the learned experience and recalls the "appropriate" emotion about the actual situation.
But is this correct always? What is the "appropriate" emotion? There are people who feel sad when summer ends and autumn approaches, on the other hand, there are people who breathe a sigh of relief and look forward to the cool colorful season. And there are some who like it when it's freezing outside and clinking from ice.
Irrational feelings
A lot can go wrong when retrieving emotions. If you have "learned" in childhood that a dog is dangerous, you will get in panic even at the sight of a tiny dog. Which is completely irrational from a logical point of view. I know children who, independently from their own experiences, only react hysterically to dogs because their parents panic. When I was a child a dog bit me in my face, so that it was necessary to sew the wound and the scar is still visible today, but I really like dogs readily.
But usually it is: Bad experiences cause aversion. E.g., it seems absurd that one reacts skeptically against a person named "Isolde" just because one had a lot of troubles with a girl "Isolde" in past times. But our subconscious works that way. Experiences aren't saved as pure information, but they are saved as "emotions for the situation".
Because of this in everyday situations appear irrational fears or aggressions that can't be classified, and whose excitation attacks you like the proverbial locusts and "swallow up" rational thinking.
The opposite of love is not hate, but it is fear.