Saturn is the last planet in the solar system that can be seen with the naked eye from the earth. As such, together with the fact that it is bounded by a series of rings, Saturn represents the boundaries of the individual.

After the limitless expansion of Jupiter, Saturn in the birth chart represents boundaries and limitations. It is the principle of structure and form. In the body, it is the skeleton, which gives the body its structure, and the skin, which is the boundary to the outside world. In the mind, it is the structure of our ego and our sense of self which we seek to preserve from the impact of changes from within and from the outside world. Saturn gives us the ability to endure setbacks and work with discipline and patience toward well defined aims. It is the need for social approval through some kind of tangible achievement. Whereas Jupiter brings rewards and opportunities through what we might call good luck, Saturn brings rewards and opportunities through hard work, limitation and self discipline.

Saturn's sign position of and aspects to Saturn show how we seek to establish ourselves as individuals and find our place in the social system of which we are a part. Any form or structure, however, when placed in the light of the Sun tends to cast a shadow. The position of Saturn in the chart therefore, shows where we find our "shadow". It is here that we meet with our greatest sense of inadequacy, lack of faith and inhibitions. Saturn shows where we are most fearful, and hence most rigid; but if these fears can be met and overcome it is the source of our greatest strength and a solid foundation from which to meet the world.