Hate, Fear, and Grief, the family of Pain;
These mix'd with art, and to due bounds confin'd,
Make and maintain the balance of the mind;
The lights and shades, whose well accorded strife,
Gives all the strength and colour of our life."
Essay on Man, Epist. II.
Again:
"Amazement in his van with Flight combin'd,
And Sorrow's faded form, and Solitude behind."
Gray, The Bard.