June 20

You have asked regarding the influence of evil spirits. Evil spirits are deprived of Eternal Life. How, then, can they exercise any influence? But as Eternal Life is ordained for holy spirits, therefore their influence exists in all the divine worlds.

At the time you were here, this question was accordingly answered, that after the ascension of the godly souls, great influence and wide spreading bounties are destined for them, and all encircling signs in the seen and unseen are decreed for them. 
- ‘Abdu’l-Baha  (Star of the West, vol.2, no. 15, December 12, 1911)