in Thoreau’s Journal:

The most interesting fact perhaps at present is these few tender yellow blossoms these half expanded sterile aments of the willow––seen through the rain & cold signs of the advancing year––pledges of the sun’s return. Anything so delicate both in structure in color & in fragrance contrasts strangely with surrounding nature & feeds the faith of man. The fields are acquiring a greenish tinge…  

…As Cawley loved a garden, so I a forest.  Observe all kinds of coincidences—as what kinds of birds come with what flowers.