I enthusiastically commend to you this six-part series on the spiritual life by Fr Maximos (Constans). I read these talks last year and found them very helpful, and then listened to the audio recordings during our Canada train trip this past December.
Part 1: Discoursing on the Passions
Part 4: The Buried Seed
Part 6: Taking Custody of our Thoughts
These lectures are also available in audio format from Patristic Nectar Publications.
Fr. Maximos is a Senior Research Scholar at Hellenic College/Holy Cross in Brookline, MA. He is an Athonite monk, one time professor at Harvard Divinity School, accomplished author and translator, and lectures internationally in both academic and parochial venues.