Marvelous is the word that comes to my mind. Your post has given me an outlook which was somehow getting coagolated with the other materialistic things. Clarity of thought and the sense of contentment is what everyone needs, to stay happy in life. As you said, it's a state of mind and as any sane person, it's our responsibility to ka people a tab on our senses at all times. This way we can stay happy on limited things also.