How much is enough?

That would be strictly dependent on your personal definition of "enough." It may also be particular to what area and sense you are using the Word. In other Words, are you referring to enough money, success, abuse, pain, happiness, contentment, etc.? This is a question that only you can answer in regards to yourself, but before you attempt this you must have a strong foundation in the area you are referring to, and the strength of that foundation lies within the strength of its definition. Thus, first appropriately define, use good critical thinking skills, and then pursue.