Blind reaction to them out of ignorance results in misery, deep misery-dukkhasamudayagaminipatipada. Awareness of sensations and equanimity towards them takes us on the path that leads to liberation from all suffering-dukkhanirodhagaminipatipada. At the time of death, some sensation will arise, and if we are not aware and react with aversion, we will go to lower planes of existence. But a good meditator who remains equanimous to these sensations at the time of death will go to a favourable plane. This is how we make our own future.
Death can come at any time.
We do not have an agreement with death that it should come only when we are ready. We are ready whenever it comes. This is not an ordinary technique. It is a priceless gem that can liberate us from the cycle of birth and death and can improve not only this life but also future lives ultimately leading to full liberation. But we do not have time.