Knowledge is an inner fortification that enemies cannot destroy, and is the ultimate impregnable defence. (Tirukkural, 421)
That is righteousness which is free from these four things: envy, lust, wrath and harsh word. (4.5)
Virtue begets honour as well as riches and so can there be a greater good for mankind than virtue?
All lives on this earth will venerate the man who has gained control over his soul. (268)