Rahu is probably the most dreaded planet of all and the irony is that it is not even a planet but a mere shadow. It is associated with many things and people interpret its results variedly. No two astrologers will be giving the same prediction usually for the same placement of Rahu or Ketu. I am going to talk about the placement of rahu and ketu with respect to the horoscope of time i.e. kaalpurusha's horoscope where Aries will fall in the first sign, Taurus in second and so on. One can correlate with his natal chart the effects of these two in his horoscope in houses and signs.
When Rahu occupies 12th house or Pisces, Ketu comes in the 6th in Virgo. The native keeps worrying for reasons others would not even think for a while. To keep endless worries within is a major drawback of this position of these two shadows. Disbelief in God or religion is also a likely outcome of this placement. Insomnia is also likely and psychosomatic disorders are possible. The native is obsessed mostly with his own thoughts and things. There is an underlying feeling of guilt and fear of unknown in the native.