“Your Father in heaven, by endowing you with the power to choose between truth and error, created the potential negative of the positive way of light and life; but such errors of evil are really nonexistent until such a time as an intelligent creature wills their existence by mischoosing the way of life. And then are such evils later exalted into sin by the knowing and deliberate choice of such a willful and rebellious creature.
This is why our Father in heaven permits the good and the evil to go along together until the end of life, just as nature allows the wheat and the tares to grow side by side until the harvest.”
"The servants then asked their master, ‘Would you have us go out and pluck up these weeds?’ But he answered them and said: ‘No, lest while you are gathering them up, you uproot the wheat also. Rather let them both grow together until the time of the harvest, when I will say to the reapers, Gather up first the weeds and bind them in bundles to burn and then gather up the wheat to be stored in my barn.’” Said Jesus.
From the book "The Life and Teachings of Jesus" www.thejesusbooks.com