A devotee can bring Krsna perfectly under his control. This is explained in Srimad-Bhagavatam (10.14.3): ajita jito 'py asi tais tri-lokyam. Krsna is never conquered by anyone, but a devotee can conquer Him through devotional service. As stated in the Brahma-samhita (5.33): vedesu durlabham adurlabham atma-bhaktau. One cannot understand Krsna simply by reading Vedic literature. Although all Vedic literature is meant for understanding Krsna, one cannot understand Krsna without being a lover of Krsna. Therefore along with the reading of Vedic literature (svadhyaya), one must engage in devotional worship of the Deity (arcana-vidhi). Together these will enhance the devotee's transcendental understanding of devotional service. Sravanadi suddha-citte karaye udaya (Cc. Madhya 22.107). Love of Godhead is dormant within everyone's heart, and if one simply follows the standard process of devotional service, it is awakened. But foolish mundane people who simply read about Krsna mistakenly think that He is immoral or criminal.