Relative knowledge (like that of Science - Physics or Chemistry) can become out-dated or modified with the passage of time. Scientists are struggling with their imperfect senses to defeat an imperfect relative truth and to introduce another better imperfect relative truth. But the Bhagavad-gita is not like that. The Bhagavad-gita carries absolute knowledge, spoken by the Absolute Person, Sri Krishna, the Supreme Personality of Godhead, who has perfect senses. He gave the same knowledge a hundred and twenty million years ago to Vivasvan as He mentions in Bhagavad-gita (4.1). Today the same message is available without any change. So the knowledge of Bhagavad-gita is Raja-vidya, the king of all knowledge. It is beyond time, place and circumstances. Despite the advancement of science and technology, there has been no change in man's taking birth, aging, getting diseases and dying, as these problems can never be solved by any amount of scientific or technological advancement. The amount of pain and pleasure that one has to experience is decided at the time of birth according to one's karma, and no one can escape from it without surrendering to the Lord. All modern electronic gadgets like mobiles, computers, TV, etc., have apparently brought great comfort to our bodies and senses, but we have not escaped the pains at all. The pains have now taken the shape of stress, tension, depression, inferiority complex, cut-throat competition for survival, mental diseases, etc., that are far more painful. The Bhagavad-gita has the solution to all these and is most relevant in the modern era. This is the reason why Indians, Americans, Europeans and people from all over the world are able to appreciate the process of Krishna consciousness. People have taken to Krishna consciousness and have felt not only relief from sufferings, but have found great purpose to life. The Bhagavad-gita can elevate one beyond the material platform of caste, creed, color, nationality, language, age barrier, educational qualification, time, place, circumstances, etc., and help one get in touch with Sri Krishna and His divine instructions that can benefit the soul eternally.
Hare Krishna! Dhirasanta dasa Goswami