This 'spiritual naturalism' has an easy resonance and beguiling charm that is salubrious to other "ever-becoming" belief systems, including science. The unadulterated teachings of the planet's greatest master- teachers all overlap and affirm nature and each other, reciprocally.
Proof of any faith, science or belief system, however denominated, is always in its pudding--in its works! "Prove me now herewith said the Lord of Host..." Malachi 3:10. Such verifiable "proof" is all around us, inside of us, and it is, indeed, that which produced us, and that which sustains us! Amen!