The Supreme Lord Sri Krsna cannot be seen by our present conditional vision. In order to see Him, one has to change his present vision by developing a different condition of life full of spontaneous love of Godhead. When Sri Krsna was personally present on the face of the globe, not everyone could see Him as the Supreme Personality of Godhead. Materialists like Ravana, Hiranyakasipu, Kamsa, Jarasandha and Sisupala, were highly qualified personalities by acquisition of material assets, but they were unable to appreciate the presence of the Lord. Therefore, even though the Lord may be present before our eyes, it is not possible to see Him unless we have the necessary vision. This necessary qualification is developed by the process of devotional service only, beginning with hearing about the Lord from the right sources. The Bhagavad-gita is one of the popular literatures which are generally heard, chanted, repeated, etc., by the people in general, but in spite of such hearing, etc., sometimes it is experienced that the performer of such devotional service does not see the Lord eye to eye. The reason is that the first item, sravana, is very important. If hearing is from the right sources, it acts very quickly. Generally people hear from unauthorized persons. Such unauthorized persons may be very learned by academic qualifications, but because they do not follow the principles of devotional service, hearing from them becomes a sheer waste of time. Sometimes the texts are interpreted fashionably to suit their own purposes. Therefore, first one should select a competent and bona fide speaker and then hear from him. When the hearing process is perfect and complete, the other processes become automatically perfect in their own way.