The power of now by Eckhart Tolle changed my life when I was young. It shifted me from being extremely outwards oriented, to re-discovering the joy of the little things. I had discovered that there is always space between feelings, thoughts and 'you', always available, which was a huge relief since I was living in a torrent of uncertainty and disappointment for years up until then.

The undeniable fact that there is only ever 'now' was also a bombshell of a realization. What a wonderful book that one, for those who have the disposition to grok it.