How can a spirit be omnipresent?

[Jack3]

God is a spirit, ie formless and bodiless. He does not occupy space. Then how can he be omnipresent?

[Obi-Wan Kenobi]

He is present by His power and knowledge.

[Jack3]

So omnipresence actually means omnipotence and omniscience?

[Obi-Wan Kenobi]

https://www.newadvent.org/summa/1008.htm

[gherkin]

But more importantly, the Holy Spirit has perfect knowledge of everything that happened, is happening and will happen. His presence covers the earth both physically and spiritually, so He knows all that is happening.

This makes it sound like God's knowledge is based on the observation of things, but that isn't so. God's knowledge is causal.

[gherkin]

So omnipresence actually means omnipotence and omniscience?

No, and for multiple reasons. Most simply, God's omnipotence is far from exhausted by what he does. But his omnipresence is exhausted by where he is. That is, he isn't anywhere that isn't. But he can do things he doesn't.

[Obi-Wan Kenobi]

He also knows things that could happen but don’t (or didn’t, or won’t).