A leader leads by example, whether he intends to or not.

Example isn't another way to teach, it is the only way to teach

Setting an example is not the main means of influencing another, it is the only means.

I am absolutely convinced that no wealth in the world can help humanity forward. The example of great and fine personalities is the only thing that can lead us to fine ideas and noble deeds. Can anyone imagine Moses, Jesus or Gandhi with the money bags of Carnegie? The World as I See It.

A good example has twice the value of good advice

It shows a new example of independent evolutionary adaptation in the frogs for life in habitats filled with loud background noise.