This event is important for both Jews and Christians alike as it is a fulfillment of an Old Testament prophesy by Jesus and there are four main reasons why the Pentecost is significant for Jew and Christians. First of all, evidence is provided by God that he is the savior and messiah. Second, Jesus' death is a payment for our sins. Thirdly, His resurrection assures us of eternal life. Lastly, his spirit wants to indwell within us, providing us with a personal, life- transforming relationship with God if we choose to follow him
Mathew 28:18 teaches us that Jesus has been entitled full authority over human angelic realms as a result of his death and resurrection which was a price paid for our sins. This may be bewildering for many and may lead us into questioning God "why is there sickness", "why is there war", "why aren't certain prayers answered?"
We have an adequate answer, but not a complete one; Jesus is to overcome these tribulations when he comes back to earth and reigns as God's anointed King. In the intervening time, he exercises his power chiefly for a different purpose, which is to fulfill his Great Commission (Matt 28:19). He reveals his sovereignty not by fulfilling our positive circumstances and overruling our negative ones, instead he works through all our situations enabling opportunities for us to share his gospel.
This is what can be seen as what happened on the Day of the Pentecost- all opposition and difficulties were not removed, but Jesus worked through the situation providing them an opportunity to be his witnesses.
The Pentecost was one of the factors that...