Hi Deborah,
Does your freind believe the gifts of the spirit such as prophesy, tongues, healing, miracles are for today? If not, then I don't think any amount of scriptures would convince him. If he does believe these things are for today, perhaps he misunderstands what we mean by "interpretation of dreams" & how a believer should receive an interpretation.
In the OT if a known prophet of God was walking in obedience to God, he/she said "This is what the Lord says", & that was it. That was God's message word for word to the recipients, no testing (apart from the fulfilment test Deut 18:20-22, & the worrship other God's test Deut 13:1-3) discussion or debate. The nature of prophesy has changed in the NT. In the NT, in relation to prophesy we are told to "Test everything. Hold onto the good". We are also told "We know in part & we prophesy in part". I believe this applies to interpretations also. It is up to the recipients to test the interpretation & hold onto the good. It is still up to the recipient to discern what God is saying to them. Because we are all learning & growing & only have part of the picture, mistakes will be made as we learn & grow.
If he thinks believers should be able to discern dreams without any input from others, then this should also apply to other areas such as tongues & interpretation. But is is clear from these verses that there can be cases where a believer can give a message to a group in a tongue but have no interpretation himself:
1 Cor 14:27 If anyone speaks in a tongue, two—or at the most three—should speak, one at a time, and someone must interpret. 28 If there is no interpreter, the speaker should keep quiet in the church and speak to himself and to God.
As a general principle, there is an inter-dependence in the body of Christ- 1 Cor 12:21 The eye cannot say to the hand, “I don’t need you!” And the head cannot say to the feet, “I don’t need you!”. What one person lacks is made up for in another.
There is also the apostle Paul's vision in Acts-
Acts 16:9 During the night Paul had a vision of a man from Macedonia. The man urged Paul, "Come to Macedonia to help us." 10 As soon as Paul had seen the vision, we immediately looked for a way to go to Macedonia.
We concluded that God had called us to tell the people of Macedonia about the Good News.
The word "concluded" above is the greek word
http://www.biblestudytools.com/lexicons ... ibazo.html
sumbibavzw from (4862) and bibazo (to force, causative [by reduplication] of the base of (939))
Transliterated Word TDNT Entry
Sumbibazo 7:763,1101
Phonetic Spelling Parts of Speech
soom-bib-ad'-zo Verb
Definition
to cause to coalesce, to join together, put together
to unite or knit together: in affection
to put together in one's mind
to compare
to gather, conclude, consider
to cause a person to unite with one in a conclusion or come to the same opinion, to prove, demonstrate
to teach, instruct, one
King James Word Usage - Total: 6
knit together 2, prove 1, assuredly gather 1, instruct 1, compact 1
So this wasn't a flash from the blue where Paul received the full word-for-word interpretation instantly from God. It says "We concluded" so clearly there were others involved, not just Paul. There was a coalescing, a putting together, a coming to an opinion within the group.
Hope this helps.