Yate -

If you always do what you've always done, you'll always get what you've always got.

Visible Dave Project

$$\begin{bmatrix} 1 & 0 & \ldots & 0 \\ 0 & 1 & 0 & \vdots \\ \vdots & 0 & \ddots & 0\\ 0 & \ldots & 0 & 1_{n} \end{bmatrix}$$