Later, for having burnt the candle at both ends, his health worsened increasingly; at last his whole body broke down and lost the sight of his both eyes.

后来又因劳累过度，健康日益恶化，终于全身瘫痪。双目失明。

youdao

So, in spite of the fact that teacher is like candle burning at both ends, you need to be willing to get burnt with smiles in tears.

因此，尽管老师就像蜡烛两头点，你还得开心的点着，即使笑中带泪。

youdao