'Valid' in the Bible

“If I alone testify about Myself, My testimony is not valid.

There is another [My Father] who testifies about Me, and I know [without any doubt] that His testimony on My behalf is true and valid.

Then the Pharisees told Him, “You are testifying on Your own behalf; Your testimony is not valid.”

Jesus replied, “Even if I do testify on My own behalf, My testimony is valid, because I know where I came from and where I am going; but you do not know where I come from or where I am going.

Even in your own law it is written that the testimony of two persons is true [valid and admissible].

Therefore, [inheriting] the promise depends entirely on faith [that is, confident trust in the unseen God], in order that it may be given as an act of grace [His unmerited favor and mercy], so that the promise will be [legally] guaranteed to all the descendants [of Abraham]—not only for those [Jewish believers] who keep the Law, but also for those [Gentile believers] who share the faith of Abraham, who is the [spiritual] father of us all—

for a will and testament takes effect [only] at death, since it is never in force as long as the one who made it is alive.