Thirukural composed by Sage Tiruvalluvar contains worldly wisdom and universal truth.
There is no greater wealth one can acquire than Dharma and no misfortune greater than the forgetting of it.
Go as far as your strength and resources permit without swerving from the path of Dharma.
Keep the mind free from evil thoughts. This is what Dharma is all about. External observances of Dharma are only sound and show.
Only the joy that comes from right conduct is true happiness. Other pleasures are really sources of pain and causes of shame.