In this in-depth Bible teaching, we explore two critical Hebraisms that unlock major New Testament passages: the Key of the House of David (Isaiah 22) and "All shall be taught by God" (Isaiah 54). First, we examine the Old Testament background of the Key of David and how it reveals delegated royal authority under the king. This foundation allows us to correctly understand Jesus' words to the Church of Philadelphia in Revelation 3 and His absolute authority to open and shut doors of access, ministry, and the Kingdom itself. Next, we tackle Isaiah 54:13 and its direct quotation by Jesus in John 6. By understanding Jewish interpretive methods (PaRDeS), we expose how this passage is often misused to support Calvinistic theology. When read in its proper Jewish and prophetic context, Jesus is not teaching mystical election, but showing that God draws people through Scripture itself. Those who hear and learn from the Father through the Word come to Christ by faith. This study dismantles common misunderstandings about divine drawing, salvation, and election, and reaffirms the biblical truth of salvation by faith alone in Christ alone. SCRIPTURE REFERENCES: Isaiah 22 Isaiah 53–54 John 6 Revelation 3 Matthew 16 Acts 2 Psalm 2 1 Corinthians 15