One transcends material nature by fixing consciousness on the Supreme. The Bhagavad-gita (2.45) teaches that one should rise above the three modes of nature, and (7.14) explains how to transcend material nature through devotional service. This requires understanding the difference between matter and spirit, controlling the senses, and engaging in devotional service. The Bhagavad-gita (14.26) and (15.5-6) describe the spiritual world as eternal and full of bliss. The goal is not to improve material conditions but to return to the spiritual world.