I really like the title.
Whether there is god or not, it is OK for us to make mistakes - not only the first time, but many times, again and again ... until it works!
Small successes generate fulfillment and encourage more try and error.
Small failures build experience and resilience.
"R & D" is "Repeat and Duplicate". Only after successfully repeat previous experiments and duplicated results that we can start making small change which may or may not lead to improvement.
Aha moment is the sudden connection between seemingly unrelated concepts which give insight (or a different angle) to the solution of a problem. Again that means the concepts have been in our mind for a long time and the problem has persisted enough to recognise the significant of the sudden connection. Experience, experience!