Pitru Dosha comes out of torturing the parents or ancestors. If children torture the parents and do not understand them, then that is called Pitru Dosha. The parents have brought you up with so much love, taking pain they have given you a good life, they have been by your side and helped you grow, and then you don't give them love and inflict pain on them, that is called Pitru Dosha.

Your meditation, your being on the spiritual path, keeping a clean heart and doing a selfless service, to some degree will eliminate the Dosha from your life. See, sometimes people are miserable not because you did something to them, but they are miserable because of their own ignorance. They expect things from you which you may not be able to deliver. Then you don't get Pitru Dosha. It happens when they are really pained by something you could do, but you did not do. When you intentionally inflict pain on the parents due to your selfish reasons then that is Pitru Dosha.

Then what happens? The progeny will have problems. Your children will give you problems. The impact of it is -- children are born with some special needs; some deformities. This is all the sign of Pitru Dosha. Somewhere in the ancestral line, parents were very unhappy with their kids, now you have to become unhappy with your own kids. This is the law of karma. But there is a remedy for it, and the remedy is meditation. 'Om Namah Shivaya' chanting also helps. This is why it's called Maha Mantra. It can rectify any of these Doshas. 'Om Namah Shivaya' does not belong to only one religion. It is universal and it is for everybody.