CAN anyone be unhappy, really? Oh! what does grief matter—what does misfortune matter, if one knows how to be happy? Do you know, I cannot understand how anyone can pass by a green tree, and not feel happy only to look at it! How anyone can talk to a man and not feel happy in loving him! Oh, it is my own fault that I cannot express myself well enough! But there are lovely things at every step I take—things which even the most miserable man must recognize as beautiful. Look at a little child—look at God’s day-dawn—look at the grass growing—look at the eyes that love you, as they gaze back into your eyes!
Toska - noun /ˈtō-skə/ - Russian word roughly translated as sadness, melancholia, lugubriousness.
No single word in English renders all the shades of toska. At its deepest and most painful, it is a sensation of great spiritual anguish, often without any specific cause. At less morbid levels it is a dull ache of the soul, a longing with nothing to long for, a sick pining, a vague restlessness, mental throes, yearning. In particular cases it may be the desire for somebody of something specific, nostalgia, love-sickness. At the lowest level it grades into ennui, boredom.