A man cannot wheedle nor overawe his Genius. It requires to be conciliated by nobler conduct than the world demands or can appreciate.
 Henry David Thoreau, A Week on the Concord and Merrimack Rivers (1849). copy citation

Context

“The current of our thoughts made as sudden bends as the river, which was continually opening new prospects to the east or south, but we are aware that rivers flow most rapidly and shallowest at these points. The steadfast shores never once turned aside for us, but still trended as they were made; why then should we always turn aside for them? A man cannot wheedle nor overawe his Genius. It requires to be conciliated by nobler conduct than the world demands or can appreciate. These winged thoughts are like birds, and will not be handled; even hens will not let you touch them like quadrupeds. Nothing was ever so unfamiliar and startling to a man as his own thoughts. To the rarest genius it is the most expensive to succumb and conform to the ways of the world.” source