learning from other people's mistakes

Always learn from your own mistakes. Do not stop yourself from doing something because someone else doesn't feel it is the right thing to do. Does that extend to drugs and drinking. Jumping off a cliff. The suicides of the city where young people were killing themselves and it was a trend. People who failed at something in science and other people tried and succeeded.

Learning from other people's mistakes is also important. Reading books. Tried and tested methods.