PURPORT

Lord Brahma wanted to point out to the demigods that by the strength of the guru one can become most powerful within this world, and by the displeasure of the guru one can lose everything. This is confirmed by the song of Visvanatha Cakravarti Thakura:

yasya prasadad bhagavat-prasado
yasyaprasadan na gatih kuto 'pi

"By the mercy of the spiritual master one is benedicted by the mercy of Krsna. Without the grace of the spiritual master, one cannot make any advancement." Although the demons are insignificant in comparison to Lord Brahma, because of the strength of their guru they were so powerful that they could even seize Brahmaloka from Lord Brahma. We therefore pray to the spiritual master:

mukam karoti vacalam
paṅgum laṅghayate girim
yat-krpa tam aham vande
sri-gurum dina-taranam

By the mercy of the guru, even a dumb man can become the greatest orator, and even a lame man can cross mountains. As advised by Lord Brahma, one should remember this sastric injunction if one desires success in his life.