Why did Phillip have negative feelings toward Timothy even though he was trying to be helpful in The Cay?

Phillip had negative feelings toward Timothy initially due to his racist beliefs and prejudices. Phillip, being a white boy raised in a society with segregation, was unable to see beyond Timothy's black skin. However, as they started to depend on each other for survival on the cay, Phillip's perspective changed and he came to appreciate Timothy for his resourcefulness, kindness, and wisdom.