From my perspective, Let Life Flow is a minimalist guide (only 100 pages) to learn how to take a break from your mind. Nowadays, while we hear more and more talking about awareness and while so many books are written about how to achieve it, one could feel lost into this prolific literature and could therefore miss the point by thinking too much about it (we tend to overthink the concept of awareness which should exactly be about letting go...). By trying too much to conceptualise and think about the principles of consciousness and how to be more present to the moment, we precisely step aside from it.
Staring from this presupposition, the book gets you back on tracks and clarifies your mind. Indeed, awareness and consciousness are eventually just about letting life go and stay still and present from one moment to another. It should not cost one a lot of effort, it is already there. The author pleads then for a more intuitive and spontaneous way of living. The idea here is simple : it is urgent that we reconnect with our basic instinct in order to be able to live more spontaneously and stop the overthinking which develops nowadays. Our brain is a very sophisticated tool but which should allow us to live our life at the fullest without even thinking about it (like breathing) : this is what awareness is about, simply living our life in a very lively way, without needing to analyse and conceptualise every moment.
In clear : take a break from your mind! Allow yourself some peace of mind. This is at the end the best (and only) way to “be anchored in peace and harmony while facing life from moment to moment”.
This is the essential message I took out of the book. It is a very short essay, which goes straight to the point, very clear. The ideas developed in it are simple and abordable.