2 Timothy 3:16

From Textus Receptus

2 Timothy 3:16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:

Preservation and Inspiration are merely two sides of the same coin. Paul said to Timothy that he had known the "holy scriptures" from when he was "a child". Were these scriptures Timothy knew the so called "inspired originals"? No they would have been faithful COPIES of them, but not the temple manuscripts. The next verse explains to Timothy that THOSE scriptures are - "given by inspiration of God"

So what Paul is saying to us here is that faithful COPIES are inspired. Thus why the doctrine of inspiration and preservation go hand in hand.