"called science is as dishes of human invention, adulterated food; it is not the true manna. 6T 132.1"
"Our fathers did eat manna in the desert; as it is written, He gave them bread from heaven to eat."
Both passages use the imagery of food (manna vs. adulterated food) to represent spiritual nourishment, with EGW contrasting true spiritual food (divine truth) with false or corrupted knowledge.