Tiruvalluvar

“ What from virtue floweth, yieldeth dear delight;
All else extern, is void of glory's light.
Only that pleasure which flows from domestic virtue is pleasure; all else is not pleasure, and it is without praise. ”

“ Greater than virtue can a living man obtain?
Virtue will confer heaven and wealth; what greater source of happiness can man possess ?
Kural-32
No greater gain than virtue aught can cause;
No greater loss than life oblivious of her laws.
There can be no greater source of good than (the practice of) virtue; there can be no greater source of evil than the forgetfulness of it. ”

“ If no day passing idly, good to do each day you toil,
A stone it will be to block the way of future days of moil.
If one allows no day to pass without some good being done, his conduct will be a stone to block up the passage to other births. ”