Sun Trine Midheaven
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 Trine Midheaven
This can be a strong indication of personal success. You have a strongly developed notion of who you are, and even while you are young you will want to be an achiever.
You want a great deal out of life in terms of goals and material possessions, but you are willing to work for them. You see the necessity of putting off today's pleasure to reach tomorrow's goals. At the same time, you can get others to work with and for you, so that all of you can achieve your goals. You are probably a very practical person.
You may have very strong ideals, but you are not likely to be carried away by them, unless the planetary energies in your chart are very idealistic. Even then, your ideals are likely to be about matters that affect everyone in the real world. You have a strong sense of your own values, and you will not get along well with people whose values are very different.
Authority figures, starting with your father, will be very important in your life. If your father is absent from the scene, your mother may play a fatherly role. The first people in your life who act as authorities will strongly influence your ideas of success and the kind of success you will pursue.
Generally speaking, you should have a very good experience with these people, and they will give you a great deal of self-confidence so that you can stand up for yourself. Eventually you will be able to make independent decisions and govern your own life as well as the lives of others.