What the card describes as a feeling
The state is open, visible pleasure in a person or situation. Nothing is being concealed and nothing needs interpreting, which makes this one of the few cards where the surface reading is the correct one.
It is also the least private card in the trumps. Feeling under the Sun tends to be obvious to everyone around, so if a spread offers this about someone who has shown you nothing, that discrepancy is worth more attention than the card is.
Upright
Upright the reading is joy, ease, affection expressed freely. Confidence in the connection without anxiety attached. Where a question is asking whether someone is happy about you, this is the plainest yes the deck contains.
There is a childlike quality to it in the tradition, meaning unguarded rather than immature. The warmth is not calculated and has not been rationed.
Reversed
Reversed the light is dimmed rather than reversed into hostility. The usual reading is happiness that is being dampened, delayed, or held back for a reason outside the feeling itself.
A second is warmth performed rather than felt, cheerfulness maintained as a front. A third is a person who feels it and does not trust it, so the gladness is present and unexpressed.
Outside romance
For a colleague this is simple enjoyment of working with you, which is not a small thing and is often overread. In friendship it marks the person who is straightforwardly pleased when you appear. In a family it describes a relative whose affection has never been complicated, which is worth noticing precisely because uncomplicated family feeling is not the norm.
What a feelings position can and cannot tell you
The habit of asking a card what someone feels is a modern one grafted onto positional reading. The deck contributes a quality; the person is contributed by whoever is doing the reading, and nothing outside them confirms it.
That leaves the same limit every feelings position has. A card cannot know an individual's mind. It provides a description you then attach to a name, and when the attachment hardens into fact the reading has replaced the question you might have asked. The Sun makes this obvious, because feeling this open would not need a card to detect it.
Its practical suggestion is to take the warmth at face value where you actually see it, and not to import it from a spread where you do not.
Questions people ask about this
Is the Sun the best card for feelings?
It is the plainest positive one. The warmth in it is open and unhidden, which is uncommon among the trumps.
What does the Sun reversed mean as feelings?
Gladness dimmed or delayed, cheerfulness performed rather than felt, or warmth someone does not trust enough to show.
Does the Sun mean a relationship will work out?
No. It describes a present quality of feeling. This site does not read cards as statements about what happens next.