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 Conjunct Mercury
This shows that your temperament is unilateral, or almost unaffected by conflicts with the will of others. Your personality is basically integrated, but this does not mean you will have a trouble-free life. It merely indicates that you are reasonably satisfied with yourself and with the goals you hope to realize. You do not adapt to circumstances unless doing so will serve your best interests. Because you are highly motivated to achieve your objectives, success is more than likely. You waste very little effort in activities unless they will benefit you in some way. You know how to co-ordinate your available resources with your life pursuits, and always have the skills required to carry out any special task you choose. No-one is allowed to interfere in your affairs; nor do you concern yourself with the affairs of others. You establish a barrier between yourself and others and do not permit anyone to intrude. You can become enormously successful in your own estimation, even if others can't judge your success. You don't measure your level of accomplishments by the same devices most people use when making comparisons. You can best succeed when you work alone or at least can determine for yourself how or when you do your work. In spite of your seeming self-assurance, you are not too successful in relating to people except at the social level. You are so afraid to have your emotions trampled that you keep personal contacts at arm's length. Your sensitive nature is your Achilles tendon, which you try to protect. You depend heavily on small quiet moments to give you the spiritual nourishment that your outer life feeds on. Irritated by the constant distractions and the hustle and bustle of competitive society, you must periodically rejuvenate your forces privately, perhaps in meditation.