Success is not measured by material wealth; it is measured by the impact you have on the lives of others and the positive change you bring to the world.

The first step in the evolution of ethics is a sense of solidarity with other human beings.

The desire to seem clever often keeps us from being so.

There is no limit to the powers of the human mind. The more concentrated it is, the more power is brought to bear on one point.

You don't need to know what tomorrow holds; all you need to know is the One who holds tomorrow.

A life spent making mistakes is not only more honourable, but more useful than a life spent doing nothing

I will build a great wall -- and nobody builds walls better than me.