2 Nephi 31:9

And again: It sheweth unto the children of men the straightness of the path, and the narrowness of the gate, by which they should enter, he having set the example before them.

Again, it shows people how straight the path is. It shows how narrow the gate is that they need to go through. He showed them the example.

And it also shows us how narrow the path is, how tight the gate, that we must enter. He set the example.