Estonians are a forest nation - there are many teachings on how to behave in the forest and what to pick from. In the forest, one should not swear or even think bad or evil thoughts – it is believed to open a gate to undesirable forces.
Wild animals could not be named, otherwise, they could come for an attack. For example, the wolf was called a cream eye, bush wool, a grey man, a forest puppy and St. George's puppy. It was thought, "If you talk about a wolf, it will come." Even harmless forest dwellers were sometimes considered dangerous: it was advised to avoid migratory birds, which spent the winter in distant lands and could bring trouble. But there were also good omens: it was believed that ferns, Rowan, and juniper could bring happiness. The forest helped with many diseases: juniper was a health tree, while rowan and strawberry flowers helped against nine diseases.