A marvellous post by Ryan Holiday, who is well versed in Stoic philosophy:
Seneca, the Roman statesman and writer, spoke often about wealthy Romans who have spent themselves into debt and the misery and dependence this created for them. Slavery, he said, often lurks beneath marble and gold. Yet, his own life was defined by these exact debts. With his own fortune, he made large loans to a colony of Britain at rates so high it eventually destroyed their economy. And what was the source of this fortune? The Emperor Nero was manipulatively generous with Seneca, bestowing upon him numerous estates and monetary awards in exchange for his advice and service. Seneca probably could have said no, but after he accepted the first one, the hooks were in. As Nero grew increasingly unstable and deranged, Seneca tried to escape into retirement but he couldn’t. He pushed all the wealth into a pile and offered to give it back with no luck.
Eventually, death—a forced suicide—was the only option. Money in, blood out.
You need to know what you stand for in life so you can politely decline those things that don’t mesh with your expectations and approach to life. This takes discipline, and discipline takes practice.
Source: Thought Catalog