Out of the 12 houses the first house or the lagna is the most important of them all. Being the first house, all the subsequent houses stand in relation to it. Every thing depends upon the strength or otherwise of this house.
Lal Kitab states that the house is the house of struggle between Maya and Jiva or the soul and matter. In other words it is the house of struggle to get liberation from the shakles of Maya. It is the throne of the ruler. The achievements or failures of the native depend largely upon this house.
In Lal Kitab this house also stands for education, intelligence and longevity. Mars is the ruler of the house. Sun is the natural significator. In fact Sun represents the human soul and vitality in the physical body.
Planet posited in 1st house aspects the planets in 7th house and unburdens itself to some extent provided the 7th house is occupied and not vacant. If this house is vacant the planets in 1st house become inert. This is also true if the lagna is not occupied. The lagna house becomes inactive or weak. This house has a relationship with 11th house. If the latter is unoccupied the planet in lagna gives good results. If there are a two or more planet in lagna Venus becomes the judge to decide about the nature of results. In other words Venus gets importance if there are two or more planets in the lagna. Incidently, 2nd house is the Dharmasthana or the place of worship. Venus is its ruler. It is but natural that our own deeds or misdeeds come to play their part in the struggle for liberation.