daivī hy eṣā guṇamayī mama māyā duratyayā mām eva ye prapadyante māyām etāṁ taranti te

"This divine energy of Mine, consisting of the three modes of material nature, is difficult to overcome. But those who have surrendered unto Me can easily cross beyond it." (Bg. 7.14) To surpass the influence of the illusory energy is very difficult, but those who are determined to catch hold of the lotus feet of the Lord are freed from the clutches of maya. Therefore, pure devotees can understand the Supreme Personality of Godhead, but demons, because of their miscreant behavior, cannot understand the Lord, in spite of seeing the many revealed scriptures and the uncommon activities of the Lord.