Swami Mukundananda
How can I control my body and mind when they want to sleep and be entertained?
Make body and mind your servants
Body and mind become however you mold them to be; if allowed freedom, they become the worst masters. Repeatedly with willpower reject the lazy option and choose the more energetic one.
You have to subdue them and make them your servants; they will become the best servants. So repeatedly, with willpower, reject the lazy option and choose the more energetic one in everything you do.