Robert Herrick - THE COMING OF GOOD LUCK

So Good-Luck came, and on my roof did light,
Like noiseless snow, or as the dew of night;
Not all at once, but gently,--as the trees
Are by the sun-beams, tickled by degrees.

Robert Herrick

http://www.poemhunter.com/poem/the-coming-of-good-luck/