Saint Basil believed that the Spirit is to be worshiped because the Spirit is fully equal to the Father and the Son. In early Christian history, a discussion of the full divinity of the Son led to a consideration of the Holy Spirit. One day they start to ask ‘How does Spirit proceed?’ This happened in Egypt about 360, as we know from St Athanasius’s reply, and in the years 370-380 in Asia Minor.

To make long story short, there was the Peumatomachian who do not want to accept the full div...