9.24 I am 'the only Lord' - the meaning is that I alone am the bestower of rewards everywhere.

How wonderful is this, that though devoting themselves to the same kind of action, on account of the difference in intention some partake of a very small reward with the likelihood of fall, while some others partake of a reward in the form of attainment of the Supreme Person which is unalloyed, limitless, and incomparable!

Sri Krsna explains this: