How do we know that God's plans for His kingdom are certain?

In the vision presented in Zechariah 2, God demonstrates His sovereign control over the dimensions of Jerusalem, which signifies His elect people and the ultimate kingdom of God. This is evident in the phrase 'Jerusalem shall be inhabited as towns without walls,' indicating an overflowing population marking the expansion of God's kingdom. The certainty of God's plans is underlined in John 10:14-15, where Christ states that He lays down His life for His sheep, specifying that His atonement is limited to His chosen ones. This aligns with the doctrine of particular redemption, affirming that God’s divine plan for His elect is securely established and will be accomplished in accordance with His promises.