Question: Is there a difference between 'will' and 'will-power'?
Sri Chinmoy: Some people use only the word “will”, but I like to use the term “will-power”, because there is no difference between inner will and power. When I say “will”, I see a seed, and when I say ‘power’, I see a tree. If we say ‘power’ without using “will”, that power can be vital, destructive power. Power in itself does not have to be undivine, but immediately vital power may come forward. But if I say “will-power”, then I know that it is something divine. So I feel it is good to use “will-power” instead of just “will”.
Sri Chinmoy, Truth's fountain-melody, Agni Press, 1992