Natural Concentration

“The mystic (yogi) tries to concentrate upon the Supersoul by controlling the senses from all other engagements, and thus he ultimately attains samadhi. A devotee more easily attains samadhi, or trance, by constantly remembering the Lord's personal feature along with His holy name, fame, pastimes, etc. Therefore, the concentration of the mystic yogi and that of the devotee are not on the same level. The concentration of the mystic is mechanical, whereas that of the pure devotee is natural in pure love and spontaneous affection.” (Shrila Prabhupada, Shrimad Bhagavatam, 1.9.39 Purport)