This is a very good answer given by Ajahn Jayasaro at a youth retreat recently.
He says that merely being a 'law-abiding citizen' and member of the mainstream society is not very satisfactory. He himself did not consider this as a good option when he was a young man, he was looking for something more than that as a purpose in life. People who appear 'normal' and well-behaved in the usual circumstances can behave in very unskillful and harmful ways in a different context, because their moral qualities are only superficial and have not been thoroughly developed. Examples from the 20th century show this clearly. Then he describes the modern research findings about the effect of meditation on the function and structure of the brain.
20110812 Dhamma Dialogue 1 1/2 in English by Ajahn Jayasaro
http://www.youtube.com/watch?v=fLL0R9UjHsQ
