Thirukkural 429

எதிரதாக் காக்கும் அறிவினார்க் கில்லை அதிர வருவதோர் நோய்.

Ethiradhaak kaakkum arivinaar killai adhira varuvathoor noy.

Those possessed of a wisdom that guards against adversity know no disease of fear. / A sickness born of trembling cannot touch the mind fortified by foresight.