Here’s another excerpt from Eusebius that I liked:
Οὐδὲν γὰρ ἁγιάζεται μὴ τῇ παρουσίᾳ τοῦ Πνεύματος.
Or:
For nothing is consecrated except by the presence of the Spirit.
Eusebius of Caesarea, On the 32nd Psalm
Update: I expanded on this quote here.