James E. Faust reminds us that we don’t always have to touch the burner to know if a stove is hot:

Learning by experience has value, but the “school of hardknocks” is deserving of its name. Progression comes faster and easier by learning from our parents, those who love us, and our teachers. We can also learn from the mistakes of others, observing the consequences of their wrong choices.”
“Choices” James E. Faust, April 2004 General Conference