*(Saturn in the 7th does not run without Venus (paper notes); if Sun is not in the 4th, it does not melt so easily.)*
This is a profound economic and astrological secret from Lal Kitab.
Saturn in the 7th house is exalted (Uchha). It represents massive business potential and machinery. But Lal Kitab reveals that Saturn (machinery/labor) cannot function without Venus. In the modern world, Venus represents "Kagaz ke note" (paper money/currency).
A person with Saturn in the 7th house will only achieve their massive business potential if they have a constant flow of liquid cash (Venus). If they lock their money in dead assets, their business will freeze.
Furthermore, this Saturn is so strong that it will not "melt" (fail) easily, unless the Sun (Surya) is sitting in the 4th house, which creates a direct, destructive aspect on the 10th house of career.