in Thoreau’s Journal:

A really warm day…. The shade is even agreeable today. I smell the pines lately; is it because they are starting? O the huckleberry bird! The viola pedata budded, ready to blossom….Every part of the world is beautiful today– – The bright shimmering water–the fresh light-green grass spinging up on the hills–tender firm moss-like before it waves.– the very faint blue sky without distinct clouds is least beautiful of all, having yielded its beauty to the earth–& the fine light smokes–sometimes blue against the woods.– and the tracts where the woods have been but the past winter. the beautiful etherial not misty blue of the horizon–& its mts., as if painted. Now all buds may swell methinks–now the summer may begin for all creatures….