Per the Nicene Creed:
[One name for the Holy Spirit is] the Giver of Life
Per the Holy Bible:
And I will ask the Father, and he will give you another Advocate, who will never leave you. He is the Holy Spirit, who leads into all truth. The world cannot receive him, because it isn’t looking for him and doesn’t recognize him. But you know him, because he lives with you now and later will be in you.
And because you belong to him, the power of the life-giving Spirit has freed you from the power of sin that leads to death.
The Spirit of God, who raised Jesus from the dead, lives in you. And just as God raised Christ Jesus from the dead, he will give life to your mortal bodies by this same Spirit living within you.
Those who live only to satisfy their own sinful nature will harvest decay and death from that sinful nature. But those who live to please the Spirit will harvest everlasting life from the Spirit.
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Truth is...Without the Holy Spirit, we couldn't experience any kind of "Christian life" whatsoever. Moral, upstanding citizens? Sure. But what made Jesus exceptional and unique was his unswerving dependence on the leading of the Spirit and entrusting himself to that leading...even to the point of death. Our efforts at being little Christs (Christians) will only be exceptional and unique if we do the same.