Did both the testaments come from God?
22But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, 23gentleness and self-control. Against such things there is no law. 24Those who belong to Christ Jesus have crucified the sinful nature with its passions and desires. 25Since we live by the Spirit, let us keep in step with the Spirit.
2 Peter 1
5For this very reason, make every effort to add to your faith goodness; and to goodness, knowledge; 6and to knowledge, self-control; and to self-control, perseverance; and to perseverance, godliness; 7and to godliness, brotherly kindness; and to brotherly kindness, love. 8For if you possess these qualities in increasing measure, they will keep you from being ineffective and unproductive in your knowledge of our Lord Jesus Christ. 9But if anyone does not have them, he is nearsighted and blind, and has forgotten that he has been cleansed from his past sins.
1 Thessalonians 4:4
that each of you should learn to control his own body in a way that is holy and honorable,
And he humbled thee, and suffered thee to hunger, and fed thee with manna, which thou knewest not, neither did thy fathers know; that he might make thee know that man doth not live by bread only, but by every word that proceedeth out of the mouth of the Lord doth man live. Deut. 8:3
Thy word is true from the beginning: and every one of thy righteous judgments endureth for ever. Psalm 119:160
Every word of God is pure: he is a shield unto them that put their trust in him. Proverbs 30:5
But he answered and said, It is written, Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God. Matthew 4:4
And Jesus answered him, saying, It is written, That man shall not live by bread alone, but by every word of God. Luke 4:4
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: 2 Tim. 3:16
note “all scripture” here in context is the OT!!!
Wherewithal shall a young man cleanse his way? by taking heed thereto according to thy word. Psalm 119:9
Thy word have I hid in mine heart, that I might not sin against thee. Psalm 119:11
What is the importance of studying the Old Testament?
Now these things were our examples, to the intent we should not lust after evil things, as they also lusted. 1 Cor. 10:6
Now all these things happened unto them for ensamples: and they are written for our admonition, upon whom the ends of the world are come. 1 Cor. 10:11
And beginning at Moses and all the prophets, he expounded unto them in all the scriptures the things concerning himself. Luke 24:27
It is Jesus himself who includes the OT as part of the christian cannon.
To the person who corrected me, thank you. But, “if” is a big word.