Born just after the First Council of Nicea in 325 and reposing two years before the First Council of Constantinople in 381 (otherwise known as the First and Second Ecumenical Councils), one man is more responsible than any other for the key changes to the Creed ratified at the latter. Our father among the saints Basil of Caesarea – Basil the Great – helped us understand the nature and work of the Holy Spirit.
Not one to use a few words when 206 will do (at least in an English translation), in a sentence he summarises the nature of the Holy Spirit:
We are compelled to advance in our conceptions to the highest, and to think of an intelligent essence, in power infinite, in magnitude unlimited, unmeasured by times or ages, generous of Its good gifts, to whom turn all things needing sanctification, after whom reach all things that live in virtue, as being watered by Its inspiration and helped on toward their natural and proper end; perfecting all other things, but Itself in nothing lacking; living not as needing restoration, but as Supplier of life; not growing by additions; but straightway full, self-established, omnipresent, origin of sanctification, light perceptible to the mind, supplying, as it were, through Itself, illumination to every faculty in the search for truth; by nature unapproachable, apprehended by reason of goodness, filling all things with Its power, but communicated only to the worthy; not shared in one measure, but distributing Its energy according to “the proportion of faith;” in essence simple, in powers various, wholly present in each and being wholly everywhere; impassively divided, shared without loss of ceasing to be entire, after the likeness of the sunbeam, whose kindly light falls on him who enjoys it as though it shone for him alone, yet illumines land and sea and mingles with the air.
What does this mean for us?
So, too, is the Spirit to every one who receives it, as though given to him alone, and yet It sends forth grace sufficient and full for all mankind, and is enjoyed by all who share It, according to the capacity, not of Its power, but of their nature.
In other words, we can have as much of the Holy Spirit as we can handle.