The 10th house is the house of career and karma. It is the permanent home of Saturn (Shani).
When Saturn sits in its own 10th house, it demands absolute focus. Lal Kitab gives two brilliant pieces of advice for this placement: 1. The Slight Hiss: You must have a pure heart ("nek dil"), but you cannot be a pushover. You must maintain a "halki si phunkar" (a slight hiss, like a snake) so that people respect your boundaries and do not take advantage of your goodness. 2. The Seated Work: Your greatest success will come from work that requires you to sit in one place and focus deeply (like administration, writing, or consulting). Running around aimlessly will destroy your Saturn's power.