Every evil has its remedy, except folly

शक्यो वारयितुं जलेन हुतभुक्छत्रेण सूर्यातपः
नागेन्द्रो निशिताङ्कुशेण समदो दण्डेन गोगर्दभौ ।
व्याधिर्भेषजसङ्ग्रहैश्च विविधैर्मन्त्रप्रयोगैर्विषम्
सर्वस्यौषधमस्ति शास्त्रविहितं मूर्खस्य नास्त्यौषधम् ॥

- नीतिशतकम्

Fire can be extinguished with water. The sun can be avoided by using an umbrella. A strong elephant can be subdued with a sharp goad. A donkey or a bull can be controlled with a stick. Diseases can be cured using medicines. A poison can be neutralized by the usage of various spells. For everything, there is a remedy prescribed in scientific scriptures, but there is no remedy for a fool.

Every evil has its remedy, except folly.