4 - Stability and Process 
As in building a house or anything else for foundations. 

Positives - Hard worker, practical, honest 
Negatives - Uptight, can't seem to slow down, hates to break out of a routine 
Careers - Administrator or anything related to working in a team 

Fourth House - Home 
Your personal power around house/home, and home base. Basic security; how you see yourself subjectively; house of more closely linked parent; ancestry, origins, foundation, general conditions at the end of life; real estate and inheritance through parental background; the underlying pattern of operation in your approach to the world, transportation; possibly more the real you than is shown through the first house.

Light: Deep understanding of philosophy, knowledge transcended into wisdom, deep bliss, warmth felt within, forgiveness. 
One never can see the thing in itself because the mind does not transcend the phenomena. Being above and independent of the material universe. - Hilaire Belloc 

Shadow: Anxiety, confusion, feelings of irrational deep fears.

You hold deep fears. 
You are afraid of being alone. 
You feel 'stuck' unable to move forward and transform.

CANCER 
The need to protect the self and family from threat is one of the cheif Cancerian characteristics. Challenge a Cancerian in an argument and a remarkable self-defence system springs into action. The expression tightens and clouds, a frown quickly appears between the eyes and there is an instant, rather snappy answer. This is a rather enigmatic zodiac type, but famililarity with a Cancerian reveals loving kindness and caring beneath an unpromising surface. A high emotional level is married to a very considerable intuition.

What are the Archetypes? 
They are patterns of the psyche that make up an energetic realm that you were assigned to before you were born. The Universe works on our behalf through archetypal patterns. We each have personal mythologies. Eg Michael Jackson - Peter Pan, the eternal child! 

The Mother type is the Life Giver. Gaia is Goddess of Life. The pattern is the power of compassion and the birthing of anything new. "As you sow, so shall you reap". Alchemist, Mother, Nurturer, Goddess, Queen, Father, Midas.