Trinity dogma uses an Ancient Greek Neoplatonism philosophical word hypostasis to describe the Father and the Son. Hypostasis does not mean what the simple explanation suggests it means. People taking the meaning usually given - of one substance - are likely to read it in terms of the modern meaning of substance and be very much misled by this. In modern terms, one could say that the Father and Son share fundamental values, beliefs, or principles. This idea aligns with the theological concept of their unity in purpose and essence. But see how different this is from our common concept of substance in this scientific age.
