What does it mean that all the gifts given by fate are marked with prices in the dark?

Deeply understand that "all gifts given by fate are marked with prices in the dark";

Don't think you can get anything easily. Everything in life requires your efforts and costs. Even if you can get some gifts in life easily, you will eventually pay the price, not worth the loss.

It can also be understood as: this sentence is to warn others not to be insatiable, not to try to get something for nothing, and also to persuade people not to be extravagant, thinking that pies will fall in the sky, or to pay down-to-earth and live seriously, or they will pay the price.

The Broken Queen from Zweig

There was a girl named Marie Antoinette, the youngest daughter of the Austrian Queen in the 8th century. In order to strengthen diplomatic relations, she married the French prince at the age of 15. Four years later, the king died, the prince became Louis XVI, and she became the queen.

Louis XVI suffered from recessive diseases, and Marie Antoinette was widowed for seven years. Her hormones were hard to shake off, and she began to drink and gamble day and night, singing and dancing day and night with the ladies and handsome young knights who flattered her. She loves dressing up, chasing luxury jewelry, and even intervening in state affairs, seeking official positions and annuities for her minions, resulting in high government debts. Louis XVI was honest, cowardly, and perhaps heavily in debt, obedient to the queen.

At that time, the influence of the American War of Independence had been fermented in Europe, and intellectuals realized that "a country without a king" was actually possible. The bottom people lived in poverty, the national finance was on the verge of collapse, and the French Revolution broke out. Of course, the king was very kind, mistaking da ji for his country and pointing the finger at "Austrian women", "wives who lost their wealth" and "prostitutes in promiscuous courts".