At first, one comes to know God, he is brought into a line of faith. Faith is believing in what you dont see – the supernatural or spirit realm. God is spirit. Faith requires us to believe not look.
Once we achieve faith, we are brought back into the position of participation.
God commands; we hear and obey.
Co-laboring says we do our part as best we can without striving and with complete rest in Him. Faith says that everything shy of achieving what God has said will be accomplished by him – no matter how great the gap.