The upright Sun is all about reason, light, order. It is a card of youthfulness, children and music, of clear thought and the feeling that all is right in the universe. Reversed....
1) Opposite: Opposite would most logically be "night" or the "The Moon" but we have those cards already. With the Sun, reason and order SHOULD prevail--with the Moon, emotion and superstition prevail...so what of the Sun reversed? Say that poor logic
and bad reasoning
prevail. Facts are presented, but taken out of context. Wrong conclusions are reached, arguments are twisted. This is not chaos so much as "disorder." Things are in place, just not in the right place.
Which, frankly, can be far more frustrating than if the Moon were ruling and all was just chaos and anarchy.
2) Blocked: The Sun's energy is all about clarity, reason and light. Blocked gives us an eclipse. Things seem dark, muddled, unclear; illogical--but there is hope that once the eclipse is over, the light will shine again. Give the Sun's connection to children, this could also indicate problems with pregnancy or getting along with young children.
This would also be a bad card for musicians or mathematicans, ruled by the Sun, a reversed card would indicate disccordant music for the musician, and problems wrongly solved for the mathematician. What should make sense and be harmonious is not.
3) Upsidedown: Reverse the Rider card and the Sun sinks down instead of rising up. The child loses his banner and his seat on the horse, the sunflowers wilt. The Sun provides life to flowers to people. If it is reversed and going down, then its light and warmth is fading, and so is the life it supports. The innocence, wisdom and clarity of childhood loses it's triumphant seat and banner as well.
This is not, as with the blocked card, a suggestion that the light is temporarily gone. This is a fading Sun--it suggests that the querent is either unable to recapture youth and childhood--or that they are refusing the light. There is a suggestion here that they would rather be in shadow, then see what the light might show them.
It is possible that the querent is rejecting reason and logic. Or that the querent cannot stop the light from fading. Ignorance is winning, as are the dim and short-sighted forces of cynical adulthood. No one is listening to youthful protests, or thinking of the children, of future generations. Energy fades, the light fades, music and wisdom fade. Something must be done before all the flowers have wilted away.