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Saturn is where you "find" the "problems" in your life. Saturn "limits." In the area where Saturn is, you will have to work harder to achieve your goals.
Saturn is also the representation of karma, unlike Jupiter, which is the "Dharma."
Saturn in the 10th house can give you bad reputation, career problems, bad social standing, problems with power figures, such as police, bosses, people in positions of power and other people connected to the 10th house.
In the area where Saturn is located, it is necessary to work seriously on it so as to achieve a positive influence. Some people with Saturn in the 10th house occupy high positions of power, for example, generals and politicians.
In the 4th house, you may have problems related to your family, your psychological state, poor family, divorce, problems with a family member, "unethical" parents and more.
For a general understanding of Saturn's function see here.
Link: SaturnExternal ↗