Bg 7.14

daivi hy esa guna-mayi
mama maya duratyaya
mam eva ye prapadyante
mayam etam taranti te

Word for word: 
daivi — transcendental; hi — certainly; esa — this; guna-mayi — consisting of the three modes of material nature; mama — My; maya — energy; duratyaya — very difficult to overcome; mam — unto Me; eva — certainly; ye — those who; prapadyante — surrender; mayam etam — this illusory energy; taranti — overcome; te — they.

Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
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.

Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The Supreme Personality of Godhead has innumerable energies, and all these energies are divine. Although the living entities are part of His energies and are therefore divine, due to contact with material energy their original superior power is covered. Being thus covered by material energy, one cannot possibly overcome its influence. As previously stated, both the material and spiritual natures, being emanations from the Supreme Personality of Godhead, are eternal. The living entities belong to the eternal superior nature of the Lord, but due to contamination by the inferior nature, matter, their illusion is also eternal. The conditioned soul is therefore called nitya-baddha, or eternally conditioned. No one can trace out the history of his becoming conditioned at a certain date in material history. Consequently, his release from the clutches of material nature is very difficult, even though that material nature is an inferior energy, because material energy is ultimately conducted by the supreme will, which the living entity cannot overcome. Inferior, material nature is defined herein as divine nature due to its divine connection and movement by the divine will. Being conducted by divine will, material nature, although inferior, acts so wonderfully in the construction and destruction of the cosmic manifestation. The Vedas confirm this as follows: mayam tu prakrtim vidyan mayinam tu mahesvaram. “Although maya [illusion] is false or temporary, the background of maya is the supreme magician, the Personality of Godhead, who is Mahesvara, the supreme controller.” (Svetasvatara Upanisad 4.10)

Another meaning of guna is rope; it is to be understood that the conditioned soul is tightly tied by the ropes of illusion. A man bound by the hands and feet cannot free himself – he must be helped by a person who is unbound. Because the bound cannot help the bound, the rescuer must be liberated. Therefore, only Lord Krishna, or His bona fide representative the spiritual master, can release the conditioned soul. Without such superior help, one cannot be freed from the bondage of material nature. Devotional service, or Krishna consciousness, can help one gain such release. Krishna, being the Lord of the illusory energy, can order this insurmountable energy to release the conditioned soul. He orders this release out of His causeless mercy on the surrendered soul and out of His paternal affection for the living entity, who is originally a beloved son of the Lord. Therefore surrender unto the lotus feet of the Lord is the only means to get free from the clutches of the stringent material nature.

The words mam eva are also significant. Mam means unto Krishna (Visnu) only, and not Brahma or Siva. Although Brahma and Siva are greatly elevated and are almost on the level of Visnu, it is not possible for such incarnations of rajo-guna (passion) and tamo-guna (ignorance) to release the conditioned soul from the clutches of maya. In other words, both Brahma and Siva are also under the influence of maya. Only Visnu is the master of maya; therefore He alone can give release to the conditioned soul. The Vedas (Svetasvatara Upanisad 3.8) confirm this in the phrase tam eva viditva, or “Freedom is possible only by understanding Krishna.” Even Lord Siva affirms that liberation can be achieved only by the mercy of Visnu. Lord Siva says, mukti-pradata sarvesam visnur eva na samsayah: “There is no doubt that Visnu is the deliverer of liberation for everyone.”