15 Brothers and sisters, consider our human ways: once an agreement has been accepted, one party can’t just reject it now or add conditions. 16 The promises were given to Abraham and to his offspring. It doesn’t say ‘offsprings (plural)’ but only is only referring to the one which is the messiah. 17 So what I’m telling you is that the agreement with Abraham that was previously ratified by God, was not annulled 430 years later[ref] when the law was given to Moses and nor was the promised nullified. 18 [ref]Because if the inheritance now came by obeying the law, then it could no longer be the result of the promise, but God had already granted to Abraham via the promise. 19 So what was the law for then? Because of sinfulness, it was added until the promised descendant would come. It was directed through messengers and entrusted to Moses as a mediator. 20 You don’t need a mediator if there’s only one party involved, and God is one.