If Adam had fulfilled the first mitzvah of adhering to G-d's will, he would have invigorated his soul with a new light with the power to transform his body and make it transparent to spirituality. In other words, he would have created the World to Come. Adam damaged the world because it was no longer capable of purification, and no longer capable of becoming the World to Come. That is called kilkul, or damage. Once evil is introduced into the world and good and evil become intertwined in a parasitic relationship, purification remains impossible.