... from the Arnold Bennett 1923 collection of advice How to Make the Best of Life ... and likewise from the Bhagavad Gita translation by Stephen Mitchell, 2.40:

On this path no effort is wasted,
no gain is ever reversed;
even a little of this practice
will shelter you from great sorrow.

... as in Mantra - Relentless Forward Progress ...

(cf. No Method (2010-01-21), Power of Optimism (2016-02-23), ...) - ^z - 2016-03-16