I think in doubt does it become the virtue that I practice English?
(僕が英語を練習する事に美徳があるのか疑問に思う。)

I may believe too much own ability.
(自分の能力を過信しているのではないか？)

But I was stupid when I returned to the origin.
(しかし、原点に返ると、僕は馬鹿だ。)

Therefore virtue is born by learning.
(だから、学ぶことに美徳が生まれる。)