“An action carried out through human effort may be well planned, well performed and properly accomplished, and yet be thwarted by fate. But likewise a fated action, something not carried out by humans, may be frustrated by human effort, heir of Bharata, as happens with cold and heat, rain, hunger and thirst. And a man whose being is constrained by fate may none the less opt to carry out some different action, and fate does not prevent him from doing so.”
Book:Mahabharata