'Gain' in the Bible

No, indeed; let us hold God to be true, though every man should prove to be false. As it stands written, "That Thou mayest be shown to be just in the sentence Thou pronouncest, and gain Thy cause when Thou contendest."

that the creation itself will also be freed from its bondage to decay [and gain entrance] into the glorious freedom of the children of God.

Yet in all these things we are more than conquerors and gain an overwhelming victory through Him who loved us [so much that He died for us].