This meditation technique is quite different from thje conventional meditation techniques. This technique is actually a contemplation exercise and involves thinking over life. Though people of all age can try this technique, it is basically suitable for people with mature age (I mean 18 & above). The reason is that only those who have lived a certain (substantial) duration of life can reflect back on their past. Very young people who are still in the initial phase of their life are less likely (though not impossible) to analyze their life from the angle which this meditation demands. Nevertheless, this meditation technique is very useful for knowing our true self.