The mother is doing needlework at home while her child has an accident outside. At that moment, the needle suddenly pricks the mother's hand and her hand bleeds; the mother immediately senses that something has happened to her child. Or, when something happens to the mother, the child suddenly has a presentiment at that moment and knows that something has happened to the mother.
The principle behind this is that the two people not only have a blood relationship but also a very deep karmic affinity. This relationship is in fact a relationship between the manas of the two people, and the karmic affinity is also a relationship between the manas of the two people. Because of experiences over countless kalpas, the manas is very clear about this, so the two will pay attention to each other; once something happens to one party, the other can immediately perceive it. Why is this so? Because the manas, together with its own tathāgatagarbha, knows everything; matters and people it pays particular attention to will naturally be continuously attended to. Once something unusual happens to the other person, the tathāgatagarbha, in accordance with the manas's concerns, will send out that information, and the manas will know it. Then it will find a way to let its own mind consciousness know, so that it can be dealt with; if the mind consciousness is not made aware, the manas itself cannot handle it.
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