A kind of vision:
God does not just pour into each individual, like one jar, isolated and alone. Instead, He is pouring into everyone, and when we are together, the overflow pools together into an overflowing stream. God's goodness and grace and mercy flows also through Creation. We uniquely bear account of His deeds throughout history. Creation outside of humanity doesn't need that memory. It is our responsibility to remember, but we don't do so to tell the plants and animals about God's amazing goodness and mercy. We need that memory carried forward. Our offspring, the generations to come, need that memory carried forth to them.
All of these accounts and praises merge together to be one spring, one united source.