What did the Rebbe mean when he wrote to ignore a certain rabbi's 'tzura' and focus on his 'koach'?

When we struggle with desire, we need to 'burn it and reduce it to ashes' - but what does that mean?

Can desire exist in a vacuum?

Can 'zedonos' be transformed into 'zchuyos' or is the bad in the world unsalvageable?

+ a lengthy intro: What is the 'chassidishe parsha' and where did we go wrong with it?

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SOURCES:

Likutei Torah (see os beis): https://he.chabad.org/library/article_cdo/aid/5898907

Rebbe's letter: https://www.chabad.org/therebbe/article_cdo/aid/5054406/jewish/page.htm