Awakening from Math

Today, my Poly friend Raymond asked me a math question which made me so confused. At first,because I felt I did well in math, my confidence made me think i could slove this problem easily without any troubles. However, it took me a long time to think and i failed to get the solution. After this, I realise that though I may own this knowledge today, but it does not mean I will still have this knowledge again in my brain. Thus, do not let your confidence lead you to the wrong direction. Be honest to the truth and yourself.