Kural - 1069

The heart will melt away at thought of beggary,
With thought of stern repulse 'twill perish utterly

Explanation
To think of (the evil of) begging is enough to melt one's heart; but to think of refusal is enough to break it.

Tamil Transliteration
Iravulla Ullam Urukum Karavulla
Ulladhooum Indrik Ketum.