Zoe

“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.”
― Vladimir Nabokov

“Everyone says love hurts, but that is not true. Loneliness hurts. Rejection hurts. Losing someone hurts. Envy hurts. Everyone gets these things confused with love, but in reality love is the only thing in this world that covers up all pain and makes someone feel wonderful again. Love is he only thing in this world that does not hurt.”
― Meša Selimović

“It's a terrible thing, I think, in life to wait until you're ready. I have this feeling now that actually no one is ever ready to do anything. There is almost no such thing as ready. There is only now. And you may as well do it now. Generally speaking, now is as good a time as any.”
― Hugh Laurie

“I looked at everyone and wondered where they came from, and who they missed, and what they were sorry for.”
― Jonathan Safran Foer, Extremely Loud & Incredibly Close