What does the Bible say about God being a Spirit?

In John 4:24, Jesus explicitly declares, 'God is a Spirit: and they that worship him must worship him in spirit and in truth.' This verse underscores that God's nature is spiritual, meaning He is not confined by physical attributes or limitations and cannot be adequately represented by material images. Instead, He is to be worshipped through a spiritual communion, which requires an inward disposition dedicated to honoring Him in sincerity and genuine faith. The implication is that external forms of worship, devoid of true spiritual engagement, are insufficient to please God.