Answer: The question is put in Biblical terms. According to the Bible, all the trials and tribulations of mankind are attributed to the ORIGINAL SIN (of the Adam who disobeyed the Divine commandment, which has been inherited by man. This is agreeable to those who accept this theory of Original Sin unquestioningly. To others it seems very queer.
The Hindu mind has thought of it in more philosophical terms. Essentially, man is Divine, which is free from body mind complex, and which is of the nature of pure Consciousness. Due to the ignorance of his real nature, man thinks that he is a body associated with a mind which is full of desires and wants. The mind, which is limited by time and space, struggles to get the freedom from the wants in life by achieving the objects in the world which by themselves are limited by time, space and causality.
So, any amount of acquisition makes him dissatisfied and the struggle goes on in the form of suffering. But when the mind gets maturity through the various situations in life, it turns back to the basic questions like “Am I really a body-mind complex?” “Should I seek worldly objects to the fulfillment in life?”, “Am I not Divine intrinsically?” etc. When these questions arise then the knowledge of our True Nature comes to us by the grace of a Master/Guru.
Then the individual recognizes the fact that there is no suffering at all in the creation of the Merciful God. It is the ignorance of the FACT that “I am Divine”, makes him to identify with the limited and ephemeral body-mind complex is the cause of all sufferings in life.