1Th 5:21 Prove all things, hold fast to that which is good.
God’s own standard of proof:
By the mouth of two or three witnesses shall every word be established.
Isa 8:20 If they speak not according to this Word, there is no truth in them.
Joh 8:31 Then said Jesus to those Jews which believed on Him, if you continue in my Word, then are you my disciples indeed;
And you shall know the truth, and the truth shall make you free.
1Joh 4:1 Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
Rom 3:4 God forbid; yea, let God be true, but every man a liar; as it is written, that you may be justified in your sayings, and might overcome when you are judged.
1Joh 2:27 But the anointing which you have received of Him abides in you, and you need not that any man teach you; but the same anointing teaches you of all things, and is truth, and is no lie, and even as it has taught you, you shall abide in Him.
2Pe 1:21 For the prophecy came not in old time by the will of man; but holy men of God spoke as they were moved by the Holy Ghost.
Joh 5:40 And you will not come to me that you might have life.
Matt 11:28 Come unto me all you that labor and are heavy laden, and I will give you rest. Take my yoke upon you and learn of me; for I am meek and lowly in heart; and you shall find rest unto your souls. For my yoke is easy and my burden is light.
1Joh 4:6 We are of God; he that knows God hears us; he that is not of God does not hear us. Hereby know we the spirit of truth, and the spirit of error. (“us” refers to the Apostles that wrote the new testament; the Apostles doctrine.)