Whate'er they fail to guard, o'er lips men guard should keep;
If not, through fault of tongue, they bitter tears shall weep
-- thiruvalluvar Meaning:Whatever besides you leave unguarded, guard your tongue; otherwise errors of speech and the consequent misery will ensue.
Wealth of wealth is wealth acquired be ear attent;
Wealth mid all wealth supremely excellent.
* Meaning: Wealth (gained) by the ear is wealth of wealth; that wealth is the chief of all wealth *