"The Supreme Personality of Godhead, the Supersoul, Lord Hari, is the controller of both the living entities and the material nature. He is self-sufficient and self-effulgent. As the subject matter of perception is not the cause of our perceiving senses, so the living entity, although within his body, does not cause his eternal friend the Supersoul, who is the cause of creation of all the senses. Because of the living entity's ignorance, his senses are engaged with material objects. Since the living entity is alive, he can understand the creation of this material world to some extent, but he cannot understand the Supreme Personality of Godhead, who is beyond the conception of the body, mind and intelligence. Nevertheless, great sages who are always in meditation can see the personal form of the Lord within their hearts.
"Since an ordinary living being is materially contaminated, his words and intelligence are also material. Therefore he cannot ascertain the Supreme Personality of Godhead by manipulating his material senses. The conception of God derived through the material senses is inaccurate because the Supreme Lord is beyond the material senses, but when one engages his senses in devotional service, the eternal Supreme Personality of Godhead is revealed on the platform of the soul. When that Supreme Godhead becomes the aim of one's life, one is said to have attained spiritual knowledge."