The benefits come so quickly

I have always been so impatient with my healthy/weight loss attempts. However, I had missed how quickly the benefits come when you start being healthier. I am more alert, happier, have more energy. I am noticing the beauty of life more and more - the breeze in the trees, the birds outside etc. Maybe it is because I am on holidays at the moment - I am sure that has something to do with it but I know that drinking more water, cutting back on fats and sugar and eating more veges is having a great effect. Why didn't I learn this earlier or how come I had forgotten this?!