How do we know that Jacob's blessing of Ephraim and Manasseh was an act of faith?

Jacob's blessing of Ephraim and Manasseh, despite their birth order, illustrates an act of faith deeply rooted in God's sovereignty and purpose. Hebrews 11:21 highlights that Jacob blessed them by faith, indicating his trust in God's revelation of their future significance. By crossing his hands to bestow the primary blessing on Ephraim, Jacob was demonstrating his belief in God's promise of success and multitude, affirming that true faith recognizes and follows God's predetermined purposes.