Mool Trikon- From where a planet derives its energy and the secondary sign is Gaun – Like Source and Sink- Cause and effect.

When Mooltrikon of any sign is afflicted then it means the fruit will suffer -So either your birth is a cause or effect in this cosmos- This is what is division in this world, this is how you see a detail in every chart- see the sign rising in ascendant and if this is the sign which contains the energy of a Mool of any planet then for sure the current birth is for a particular cause and how you can identify more is by understanding the energies in lagna, While if its a secondary sign, you are sent on this earth as a fruit of previous karmas.

This is the reason why Leo becomes the king as his energies are within the Leo, not dependent for fruit or cause on anyone else while all the other signs have energies distributed where Cause and effects are different.