This post from entrepreneurNelson Wang originally appeared on Quora as an answer to the question “What is it that nobody tells you about adult life?“

My second startup had just completely failed. I came home on a Saturday night at midnight and there was a letter on my kitchen counter.

It was from a law firm threatening to sue my company.

It felt like someone kicked me in my stomach. It was one of the worst feelings in the world.

In the last 31 years of living, I wish there were a few key lessons someone taught me as I was growing up.

Here are the 10 things I felt like nobody told me about adult life:

1. The most valuable currency in the world is time

Money is valuable. Time is even more valuable.

Time is finite. Once you spend it, you cannot earn it back.

Use money to help you find more time. Time with your friends, family and loved ones. Read more…