Can anyone distinguish how his face and body change day by day? No, for one cannot point out distinct signs of change from one day to another; and if one cannot properly distinguish any change in the external self, then how can one expect to distinguish change in the inner process? It is not something that can be weighed on the scales as one weighs oneself on coming back from a holiday and sees that one has gained or lost several pounds. There is no such gain in spiritual progress.