Bhagavad Gita Chapter 11
Conclusion:
The only certainty in our life is that when time moves on it is forever lost. However much we may regret and repent, nothing will change what has happened. But we do have the power, at the moment of the present, to shape our future. Predestination is simply the choice that we did not exercise. Only when we are aware, in the present moment, can we craft our future. Not when it is still the future and not when it slips into the past. We need to use all our intelligence, energy, and creativity to live blissfully in this moment, not in thoughts about the future or regrets about the past.