What does the Spirit do? His works are ineffable in majesty, and innumerable in quantity. How can we even ponder what extends beyond the ages? What did He do before creation began? How great are the graces He showered on creation? What power will He wield in the age to come? He existed; He pre-existed; He co-existed with the Father and the Son before the ages. Even if you can imagine anything beyond the ages, you will discover that the Spirit is even further beyond.
– St Basil the Great
as quoted by Chan, Francis; Forgotten God: Reversing the Tragic Neglect of the Holy Spirit; David C. Cook Publishers; Colorado Springs, CO; copyright 2009; p. 63