Does Faith Give Life? or Feed Life?

DOES FAITH GIVE LIFE? OR FEED LIFE? In some ways, God deals the same with all… He gives breath & rain (food) to all... In some ways, God deals NOT the same with all… Abraham vs the nations… Jacob vs. Esau. All blessings are not the same… Breath is automatic… Food is worked for... Is salvation automatic like breath? Or worked for like food? Is it like rain to all or like God's choice of Jacob?