Strokes from God

Yesterday when i worked out an approach to solve a problem, i was amazed by what i have done to list down the assumptions on which the approach is based. The approach was tested by another colleague who took nearly a full day to simulate the problem and apply the approach in details. Initially the colleague found the result satisfactory while i insisted one assumption is violated so the result would be ruined. Finally the colleague proved that result was bad. i was amazed why i can write down the assumptions that i didn't intend to do at the beginning.

When i was a secondary student, i remembered at one time i was not able to give answer to a question (may be mathematical one), but the other day when i woke up, my mind was open suddenly on this question, and i solved it. In Chinese, we have a proverb called, "strokes from God", means that sometimes God write strokes to our writing/calligraphy unexpectedly to turn awful things to beauty.