I have written extensively on this subject. In my view, the reward we receive is in the form of personality development. When you perform a good deed, the reward you receive is manifested in the form of spiritual development within you. You continually receive reward in the form of intellectual and spiritual development, until your personality transforms into a purified personality deserving of paradise. I do not believe that reward is stored somewhere, like in a bank, waiting to be given later. When you perform a deed, your personality develops alongside it. The personality that forms is what you may call reward, or tazkiya (purification); it amounts to the same thing. I do not believe that reward is stored in a bank to be received later. It is given to you then and there, and you can feel it. Imagine, for instance, that I did something wrong that made you upset, yet you chose to forgive me, you responded as Hazrat Abu Ayub Ansari did, you’ll experience an incredible sense of peace, calm, and divine tranquility within. That is the true reward, the real personality development, the essence of tazkiya.