It is also the nature of this life that people have to put up with suffering and hardship for various reasons. People feel regret for what has happened in the past, anxious about what may happen in the future, and worried about what is going on in the present. The things that cross our minds and make us feel distressed are things in the past that have caused grief, things in the future that we are worried about, and things in the present which concern us. People react differently to stress and worries, depending on how many things are concerning them, whether the worry is continuous or not, and on whether they have faith in their hearts or are rebellious and sinful. People's worries and concerns will also differ, according to the differences in their motivations, circumstances and individual responsibilities. This book gives examples of different kinds of stress and worry, and discusses them in some detail.