The best way to understand the zodiac signs is to think of them as twelve separate energy fields in space that consist of either fire, earth, air, or water. This is easy to understand if you think of what happens when you pour water on fire. Obviously, you know that the fire goes out. In a sense, water has eliminated it. We all know that fire and water are not compatible.
It is helpful to know that all of us are made up of various combinations of fire, earth, air, and water energies. Our particular combination of these elements are revealed in our astrological birth chart. They reveal who we are as a human being.
For example, if you have a lot of fire signs (Aries, Leo, and Sagittarius) in your nature you would not get along with a person who was born with a lot of water signs (Cancer, Scorpio and Pisces). You would feel that the water person is too emotional, sensitive, and incapable of facing reality.
On the other hand, the water person would view you as blunt, impulsive, arrogant, and insensitive to their feelings. People encounter these kinds of dramas every day of their lives, but are not conscious of what is behind the conflicts they have with other people.
To be more specific, if you have your Moon in Cancer and your co-worker has his Mars in Aries, he will always be seen by you as a real jerk because his impulsive reactions irritate you emotionally. If you knew that these are the signs that are at the source of your problems, you could find a way to work with them. You would be able to talk about these differences and work out a solution. You might even find it humorous!
It is helpful to know that there are three fire signs, three earth signs, three air signs, and three water signs. When planets are found in these signs, they activate the energies of the signs. This is the valuable information that a skilled astrologer can find for you. He can even tell you what your relationship would be like with any other person BEFORE you even get to know them.
If you practice looking at your relationship problems in this way, you will find answers that you never thought imaginable. All you need to do is explore these secret realms of consciousness and you will be well-rewarded with great insights into human nature.