Yes without the Spirit of God there is no Salvation for any person.

The Holy Spirit seals us for the day of redemption.

Do not grieve the Holy Spirit of God, by whom you were sealed for the day of redemption.

Ephesians 4:30

The Holy Spirit intercedes on behalf of us to the father.

Likewise the Spirit helps us in our weakness. For we do not know what to pray for as we ought, but the Spirit himself intercedes for us with groanings too deep for words.

Romans 8:26

The Holy Spirit bears witness to us of Jesus Christ.

“But when the Helper comes, whom I will send to you from the Father, the Spirit of truth, who proceeds from the Father, he will bear witness about me.

John 15:26

The Holy Spirit renews us.

The Spirit himself bears witness with our spirit that we are children of God

Romans 8:16

As Scripture says; you can have only one of two Spirits living inside of you.

“No one can serve two masters, for either he will hate the one & love the other, or he will be devoted to the one and despise the other. You cannot serve God and money.

Matthew 6:24

If you don’t have the Holy Spirit then you have the counterfeit anti-Christ Spirit.

By this, you know the Spirit of God: every spirit that confesses that Jesus Christ has come in the flesh is from God, and every spirit that does not confess Jesus is not from God. This is the spirit of the antichrist, which you heard was coming and now is in the world already. Little children, you are from God and have overcome them, for he who is in you is greater than he who is in the world. They are from the world; therefore they speak from the world, and the world listens to them. We are from God. Whoever knows God listens to us; whoever is not from God does not listen to us. By this, we know the Spirit of truth and the spirit of error.

1 John 4:2-‬6