[5a top] Gemarah: A coin is the same (physical coin) [and money cannot be used for two different purposes (unlike a Get document which is defined by the varying words within it)].
D-E-ep Thoughts: We are not defined static constant objects. We always have new opportunities to grow to new spiritual levels. Our dynamic souls are constantly able to do Teshuvah. We must recognize that no matter what we have been through, we are not ‘stuck in the mud’ and should redefine the individuals we once were to come closer (and return) to Hashem.