From the Buddhism thread in the Religion discussion area on CompuServe:

Speaker 1: "Can anyone tell me if the concept of Satan or evil exists in Buddhism?"

Speaker 2: "Buddhism does not recognize an evil force or Satan. There is the concept of bad and good but this is in terms of suffering and the causes of suffering being bad, and the alleviation or prevention of suffering being good. In absolute terms, the differentiation between good and bad is itself indeterminate. All we can do is try to act to reduce the sum total of suffering."

Speaker 1: "I'm actually looking for a (tenuous) connection with Quakerism."

Speaker 2: "I think there is a strong similarity between Buddhism and Quakerism. Luke 17:21 "the kingdom of God is within you" is similar to the concept of Buddha-Nature, which every sentient being has, and the potential to realize their Buddha-Mind.

"Quakers are the only form of Christian worship I know of that emphasizes this. Their founder, George Fox (1624-1691), referred to "that Inward Light, Spirit and Grace by which all might know their salvation." This emphasis on individual spirituality extends to the meeting for worship, which largely consists of silent contemplation. I think their reliance on the "Inward Light" for spiritual guidance is a form of meditation. Curiously, this Inward Light seems to engender in Quakers a code of life which I think is very similar to Buddhism.

"The Quakers practice a religion which is dependent upon individuals accepting personal responsibility for their actions, they look within themselves for God's guidance. The final words of the Buddha "Decay is inherent in all component things. Work out your own salvation with diligence.""