You need to convert your time and your energy in something, in order to have it back later.
https://primal.net/e/note1d0hv76fq8w7hzl2m3c3t52xllrjhf9jptrv90ymmlygjxg63xawqwk3l0h
https://primal.net/e/note19xv2fcy4222m7sdafxry555g6u55cv7t9jt7yuek0mqsj5ewrnls79wtqf