Battling against life's negative functions is an indivisible part of Buddhism.

Buddhism Day by Day

Wisdom for Modern Life by Daisaku Ikeda
Monday, July 8, 2013:

 

Buddhism concerns itself with winning. When we battle a powerful enemy, either we will triumph or we will be defeated—there is no middle ground. Battling against life's negative functions is an indivisible part of Buddhism. It is by being victorious in this struggle that we become Buddhas. We have to win. Moreover, Buddhism ensures that we can definitely do so.