Shinichi Maruyama hurls black India ink into water (or visa versa) and photographs the millisecond that these two liquids collide. Capable of capturing this phenomenon at a 7,500th of a second, Maruyama takes full advantage of a recent advancement in strobe light technology which can record physical events faster than the naked eye can perceive them.
Single people want relationships, settled people wonder if they're missing out on something, traveling types miss stability, stable ones are restless, old friends want new friends, new friends miss old friends... The doubt is natural, and everyone you know -- yes, even that person -- carries it sometimes too. Allow yourself to be peaceful. Allow yourself satisfaction in what you have. If you really don't like it, allow yourself permission to make changes.