What advice does mr.brunner give to Percy in the lighting thief?

In "The Lightning Thief," Mr. Brunner advises Percy to always keep his mind open and to trust his instincts. He emphasizes the importance of being aware of his surroundings and understanding that things are not always as they seem. Additionally, he encourages Percy to embrace his unique abilities and to be brave in facing challenges ahead. This guidance helps Percy navigate the dangerous world of demigods and mythical creatures.