彼は長年の修行の末、没我の境地に達した。
After many years of training, he reached a state of selflessness.
彼女は没我の状態でピアノを弾き続けた。
She went on playing the piano, completely lost in the music.
研究に打ち込む彼の姿には没我の精神が感じられる。
You can sense a spirit of self-forgetfulness in the way he devotes himself to his research.
没我になって働くうちに、いつの間にか夜が明けていた。
While I worked, oblivious to myself, the day had dawned before I knew it.