oops...I meant 2 Corinthians 2:13-14. Verses 13 and 14, not verses 3 and 4.
The question is not that difficult.
If you accept that verse, how can you reject God's sovereignty in salvation? After all, that verse says we can't know anything spiritual unless we have the Holy Spirit, and only believers have that.
Again, though, which verse?
Second Corinthians, Chapter 2, Verses 13 and 14:
13 I had no rest in my spirit, because I found not Titus my brother: but bidding them farewell, I went into Macedonia.
14 Now thanks be to God, who always maketh us to triumph in Christ Jesus and manifesteth the odour of his knowledge by us in every place.
A fine pair of verses, but not what you quoted, nor particularly relevant here.