16“Behold, I have created the smith that bloweth the coals in the fire, and that bringeth forth an instrument for his work; and I have created the waster to destroy. 17No weapon that is formed against thee shall prosper; and every tongue that shall rise against thee in judgment thou shalt condemn. This is the heritage of the servants of the Lord, and their righteousness is of me, saith the Lord.” Isaiah 54:16-17
God has a perfect timing for His plans & purposes. Sometimes in His sovereignty He even chooses to harden hearts for the perfecting of His saints.