Sentence:  If it be supposed that the divinity of Christ was unknown to the apostles till the day of <WSD>Pentecost</WSD> ... we have no account of any such discovery having been made. 
Meaning of the word marked with <WSD> tags:  the particular (Jewish) Pentecost 49 days (inclusive) after the resurrection of Jesus on the (Jewish) Day of First Fruits, when (in Christian teaching) the Holy Spirit descended upon the Apostles with miraculous effects including the ability to explain the Gospel intelligibly in languages they did not know; or a similar occasion since