All that is old is not gold

पुराणमित्येव न साधु सर्वम्
न चापि काव्यं नवमित्यवद्यम् ।
सन्तः परीक्ष्यान्यतरद्भजन्ते
मूढः परप्रत्ययनेयबुद्धिः ॥

Not all literature that is old, is good. Similarly, not all modern literature should be condemned simply because it is new. Wise men choose the good ones only after proper examination. Only an idiot goes by others' judgment.

All that is old is not gold.