Success means different things at different times: a degree, a promotion, a stable family, recognition, a cause achieved. It is satisfying, but it can also be fragile, because it depends on conditions we cannot fully control. Many people discover that reaching a goal does not bring the lasting contentment they expected, and that the question of what success is for deserves attention.
The Gita connects success with both effort and wisdom. Gita 18.78 says that where divine wisdom and the determined, righteous effort of a human being come together, success, prosperity and firm order follow. Gita 7.22 says faithful effort bears results, and that all results ultimately come from God, so acknowledge a higher source behind your successes and pursue goals with gratitude, not ego. Gita 18.34 asks whether persistence serves values or merely feeds craving for rewards.
The Gita also warns about hollow success. Gita 17.18 says discipline practised for honor and display yields only fleeting results, so notice when your effort is aimed at impressing others. Gita 9.21 and 8.16 say rewards earned through desire-driven action are temporary, so do not build fulfillment on gains that run out when circumstances change. Gita 2.43 questions pursuits driven by craving for pleasure and power, and Gita 1.32 asks whether victory is worth what it costs the people we love.