"Your brain, like your tongue, is a muscle. Practicing thinking by yourself really helps develop your brain, which you need throughout your day. I like to practice my thinking in a darkened room, alone."

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Friends have suggested that I am the least qualified person to talk about happiness, because I am often down, and sometimes profoundly depressed. But I think that's where my qualification comes from. Because to know happiness, it helps to know unhappiness.

— Alastair Campbell