Are All Negative Thoughts Coming From Demons?

"Be gone seduce him. Your places in solitude, your bones and the nest of serpents get down and crawl with them," he said. "It is he who casts you out from whose sight nothing is hidden. It is he who repels you to whose might all things are subject." He added: 'He has prepared everlasting hellfire for you and your angels' This begs the question how are demons interacting with the psyches of humans not under their control but simply within their purview? Are all negative thoughts coming from demons? And if demons are influencing us, do angels also play a role?