If you like self help books, you must have heard of this book. This book is based on a very powerful idea. And that idea is that past or future are nothing or you could say they do not exist. And all that is there is “now” in which you are living e.g if something bad had happened to you in the past. And you are feeling sad because of that. Also you are feeling this sadness in the present moment.
Most of our sadness comes from either past or future. The past can not survive in your present. It can only survive in your absence. The secret of life is dying before you die, finding there is no death. Accept unavoidable pain. It,s about how your mind reacts.