It is Saturn’s KARAKtva to be an auditor or a police or courier boy of your own karma. It usually gives peeda and try to drive you away from extraneous “Asakati” of any thing you may have. Basically, Saturn gives such “reality check” every time it goes over any planet in your natal horoscope (the planets as they are at the time of your birth). Regardless of Sadesati or not Saturn is working relentlessly around the clock with its proximity to the FIXED Stars in all constellations/nakshatras or specific nakshatras or navamansh of a nakshatra/rashi. Saturn’s movements ensure that one is paid (good or bad) their actions! If good appropriate reward and if bad then appropriate obligation. Usually a person has a choice to pay back by good deeds or delays or sufferings in that order depending on the intensity of the karma. This karma is past karma – which is both this life past karma and also past birth past karma. One should not try to distinguish between this and past birth as it is all logically speaking the “past” to the current moment.  When Saturn goes over your Sun/Ravi, it hurts your ego, it makes you deal with seniors better, it teaches you do deal with father better. Shows illness or health issues of your father. It shows your health w.r.t heart and spine (ruled by Ravi). Ravi is “karak” of Raj-satta / administrative power, Father, Soul, Ego, Heart & Spine, bone structure apart from several other things. Check examples of this at the end of the article.  When Saturn goes over your Patrika Mars, it gives reality check w.r.t siblings (especially younger). It shows issues w.r.t blood (health), diabetes. It also shows side effects of wars, sports activities, extra competitive spirit that you might have. It also shows side effects of hard work, aggression and also at times shows issues with the land that you might have purchased or own. Mars is Karak of Sports, Wars, siblings, blood, aggression, land, and copper apart from other things. So one has some learnings with these things. This is especially troubling to the military people or sports people or warriors or real estate agents etc.