Tawwakul is not an act of the limbs-it is an act of the heart. And so while the limbs are striving hard, the heart is completely reliant on Allah. This means whatever the outcome of the limbs' striving, the heart will be completely satisfied, knowing that it is the flawless decision of Allah. But in order to reach this level, one must hold on to hope, strive with the limbs, and let go with the heart.