To be aware of a single shortcoming within oneself is more useful than to be aware of a thousand in somebody else. Rather than speaking badly about people and in ways that will produce friction and unrest in their lives, we should practice a purer perception of them, and when we speak of others, speak of their good qualities.
The feeling of being happy or unhappy rarely depends on our absolute state, but on our perception of the situation, on our capacity to be satisfied with what we have.
I find that because of modern technological evolution and our global economy, and as a result of the great increase in population, our world has greatly changed: it has become much smaller. However, our perceptions have not evolved at the same pace; we continue to cling to old national demarcations and the old feelings of 'us' and 'them'.