How does cultural conflict influence Gideons actions in no witchcraft for sale

Gideon refuses to give up a power his people have that the whites do not.

Cultural conflict influences Gideon's actions in "No Witchcraft for Sale", by Doris Lessing. When a snake spits venom into Teddy's eyes, Gideon runs to the bush to retrieve a native remedy, a root that can cure Teddy's eyesight. The word spreads that he has miraculously cured him and a scientist comes to ask Gideon for the remedy. He feels betrayed by the Farquars and leads them only to discover common blue flowers. Gideon does this to protect his culture.