If one regularly engages in killing in this life, then one tends to like killing when one’s old enough to discern right from wrong in the next life. If one likes drinking alcohol in this life, then one will like it as well in the next life; this habit will persist in every life. One’s behavior in this life is similar to that of in the next life, this is referred to as causally concordant behavioural result. The buddha taught this; today, of the people who can recollect their pervious lives, many of them have such inclination, such as liking smoking both in previous life and this life.
When I was a child, my mum told me: sunset is the sunlight of the dead. Upon seeing sunset, one needs to chant mani mantra. Now I come to realise that we need to chant mani mantra not because sunset is the sunlight of the dead; rather, we need to practice virtue because our life has lost one day.
Each time we die, the nature of mind will be revealed, but we never can perceive it. Every night when entering a deep sleep, for a split second we are in touch with the nature of mind, but we never can perceive it. Thus we need our lama’s pith instruction, with which we can attain enlightenment instantly. This is the swift method of the Vajrayana to attain enlightenment.
When our practice reaches a certain level, the external environment will not have much of an effect on us; at that point, there is no difference where we practice. However, to a beginner, the environment is very important.