The Sanhedrin couldn’t find two witnesses that would agree on the same accusation against Jesus. So, they flat out asked Him if He was the Son of God. The elders knew that the title Son of God meant deity. We see this in John 5:16-18.
If the rapture takes place right after the seven years of the Great Tribulation, then we would know the return of Jesus Christ. And we understand that the Scripture says no one can know. Why would a believer stay alert if we knew when He was coming? But, the passages make it clear that since we don’t know, all believers must be in constant readiness for the rapture. That means that Christians have to be busy doing His will and living a life of righteousness and not in sin.
The hidden things refer to God’s revelation to men through the message of Jesus Christ. The word wise here is used in a negative term because of its context. So the word wise means self-righteousness, which tells of a person who thinks that they can know God apart from His Word. And, he or she can achieve a right standing before God through their good works.
The phrase “the prince and kings of Persia” is in reference to fallen angels who have authority and great power. Their power is not in the sense of position but of physical power.