That feeling, that we thinks comes out of nothing, to be horribly depressed or to feel sad, to be thrown in to the void of things, we all have that but you can also add to be happy, to feel okay, to feel comforted out of the same nothing, A book by Emile Coue on Conscious Autosuggestion would really help. Everyday when u wake up and about to go to sleep, Say it word by word, not in inside, not thinking about it, just say the following words with ur eyes closed for 0 thoughts to intervene "Day by Day, In every respect, I am getting better and better." 20 times each and lets see how it goes. read the book for more..