This human form of life is a chance for God realization. Without God realization, our life is frustrated. We, being part and parcel of God, it is our duty to understand our relationship with God and act accordingly, and then our goal of life is achieved. The ultimate goal of life is to attain eternal life, full of knowledge and bliss, sac-cid-ānanda vigraha (Bs. 5.1). Sat means eternal, ānanda means bliss and cit means knowledge.
This body is just the opposite. It is not sat. This body is temporary. It is not eternal. This body is full of ignorance. There is practically no knowledge. We do not know, after closing our eyes, we do not know what is happening before our eyes. So our knowledge is always imperfect. And this life is also miserable. It is not at all blissful.
Every step, there are three kinds of miserable condition: ādhyātmika, adhibautika, adhidaivika. Ādhyātmika means miseries pertaining to the body and the mind. Adhibautika means miserable condition offered by other living entities. And adhidaivika, natural disturbances. So either of these three, or at least one or two, there must be always present. This is the material condition of life. But as spirit soul, we are sac-cid-ānanda vigraha, part and parcel of sac-cid-ānanda vigraha. Sat means eternal, cit means knowledge and bliss, and ānanda means blissfulness.