Marshall Field (1835-1906), the US entrepreneur, presented twelve principles, which, he said, people needed to fully understand, in order to determine life’s core values. Here they are:

The brevity of time

The power of perseverance

The rewards of hard work

The importance of simplicity

The worth of character

The fruits of kindness

The power of example

The call of duty

The value of economy

The virtue of patience

The development of talent

The joy of creativity