One must reap what they sow in this life based on Karma. Upon all of our foreheads, Vaheguru has placed the mark of our fate. When we do Ardaas to Guru Sahib, they bless us with what we ask for. The question now arises, how does Guru Sahib bless us with what we want if our destiny is already pre-written? Guru Gobind Singh Ji once explained this using the analogy of a stamp/seal. If one is to look at a stamp/seal before it is stamped, it will be backwards. Until the seal is stamped onto the paper, it cannot be read. This is the state of our bad actions, when a Sikh bows down and touches his/her forehead onto the feet of the True Guru with utmost faith, then those bad fortunes become obverse. Just like the stamp on the paper, our bad fortune become reversed and become good fortune. Guru Gobind Singh Ji teach us here that bowing down to your Guru with full faith is a great action. To learn more about this topic, read our article on the Greatness of Doing Ardaas and Matha Tek.