1. "Covenant"="Testament": The Holy Bible is divided into two major covenants (testaments).
" "Hebrews 8:13"

Hebrews 8:13 13 In that He saith, A new covenant, He hath made the first old. [Notice: two testaments-- the first is "Old" and the second is "New".]

   2. The New Covenant came into effect after Christ's death on the cross.
"Hebrews 9:17"

Hebrews 9:17 17 For a testament is of force after men are dead: otherwise it is of no strength at all while the testator liveth. KJV

  4. Jesus abolished the Old Testament Law at the cross.
"Ephesians 2:14-16"

Ephesians 2:14-16 14 For He Himself is our peace, who has made both one, and has broken down the middle wall of separation, 15 having abolished in His flesh the enmity, that is, the law of commandments contained in ordinances, so as to create in Himself one new man from the two, thus making peace, 16 and that He might reconcile them both to God in one body through the cross, thereby putting to death the enmity. NKJV

  5. The Old Testament was written for our learning.
"Romans 15:4"

Romans 15:4 4 For whatever things were written before were written for our learning, that we through the patience and comfort of the Scriptures might have hope. NKJV

  6. The Old Testament predicted Jesus as the Christ. There is no other validated religious book based on fulfilled predictions.
"Luke 24:45, 46"

Luke 24:45,46 24 Then opened he their understanding, that they might understand the scriptures, 46 And said unto them, Thus it is written, and thus it behoved Christ to suffer, and to rise from the dead the third day:

  7. The Old Testament gives examples of what happens to rebellious souls.
"1 Corinthians 10:11 "

1 Corinthians 10:11 11 Now all these things happened to them as examples, and they were written for our admonition, upon whom the ends of the ages have come.