'Preserves' in the Bible

The one who loves his life [eventually] loses it [through death], but the one who hates his life in this world [and is concerned with pleasing God] will keep it for life eternal.

I solemnly charge you in the presence of God, who gives life to all things, and [in the presence] of Christ Jesus, who made the good confession [in His testimony] before Pontius Pilate,

We know [with confidence] that anyone born of God does not habitually sin; but He (Jesus) who was born of God [carefully] keeps and protects him, and the evil one does not touch him.