The sun represents our vitality and our conscious ego, the self and its expression. It establishes our will to live and our creative force. It is associated with spontaneity and health. A well aspected Sun will describe a person who has heart, who cares for others both in general, and at the personal level. A poorly aspected Sun will describe a person who either has much more difficulty accessing this love and caring ability. In your chart the position of the sign represents your life purpose and style in which your make your mark in the world.
Sun Opposition Ascendant
The Sun opposite your Ascendant shows that you have a need to seek approval from others in order to feel good about yourself. The Sun is our self, what we essentially are, with the Sun on the 7th house cusp you need constant feedback from the world in order to feel that you are all right in the eyes of others, and so maintain your self-confidence and sense of self-worth. This can be quite problematic, and your solar center can lack cohesiveness. You will attempt to find yourself through others, you can be quite good at decision making, negotiations, therapy, and other situations where being able to slip into another shoes is advantageous. Decision-making is enjoyed best when shared with another person. You may tend to look up to and admire people who are really no better than yourself. You find it difficult to admire and respect yourself, so you project this on to other people. If your Sun is in the 7th house, you will seek through marriage a relationship with the father archetype, either by playing the role of father or by expecting the 'other' to do it for you. If the Sun is in you 6th house, you may consider working partnerships to be especially important. You maybe 'fathering' others in the sense of providing some sort of identity for them. You are very proud of your partnerships. Work on your own self confidence and inner security, inner child meditation and more self-love can help you integrate your Solar energies and give you more power to be yourself. You may feel as though life is not important without other people in your life especially a partner. You may be a quite good investigator or analyst.