"The gods dare not look at your smile, lest you fall into the mortal world at a thought." This sentence means: The gods in the sky dare not look at your smile, because your smile will make the gods fall into the mortal world. This sentence can be used to describe someone's smile that is so charming that it can even make those who see it so excited that they dare not look at your smile easily.
There may be a deeper meaning behind this sentence, which can be used to describe the temptations and dangers in life. When faced with temptations and dangers, people need to remain vigilant and cautious to avoid making mistakes based on impulse. Similarly, this sentence can also be used to metaphor the magic of love. When love sprouts in the heart, it will make people feel happy and happy, but at the same time, it will also make people intoxicated and forget their responsibilities and obligations.
In short, the sentence "Heavens dare not see you smile, lest you fall into the mortal world with just one thought" can be used to describe someone's very charming smile, and can also be used to metaphor the temptations and dangers in life, and The magic of love.