Why does danilka say that there is no secret in nature that baffles terenty?

Danilka said that there is no secret in nature that confuses Terenty because Terenty was able to answer all his questions about nature's beauty. Terenty even knows every little detail the fields have, the river banks, the birds and the trees. Danilka awed nature so much because of what he heard from Terenty.

I will have to say true.