For those readers who aren't familiar, Pentecost is the celebration of the Holy Ghost's arrival. It is the Holy Ghost that gives us the power to live according to God's Word.
Very faintly, the background text reads:
"And when the day of Pentecost was fully come, they were all with one accord in one place.
And there appeared unto them cloven tongues like as of fire, and it sat upon each of them.
And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance." (Acts 2:1, 3-4 KJV)