If almighty had invented life then he/she had given birth to good and evil.With creation of good and evil god has given an oppurtunity to human souls to differentiate between the two.My faith on divinity wouldn't accuse him/her of the later invention. With clear understanding of differences between good and evil rational human minds can take necessary steps to avoid evil and embrace good. One appreciates light better with an in-depth understanding of darkness.Only when we know what evil can do will we arrive at goodness with certainty.