Do not judge a book by its cover

नवं पुरातनं वापि
लेखं पश्यन्ति पण्डिताः ।
सारमासाद्य तुष्यन्ति
निःसारञ्च त्यजन्ति ते ॥

Whether it is new or old, it is the content of literature that the scholars study. They enjoy the ones that are essentially significant, and reject the ones that are undistinguished.

Do not judge a book by its cover.
A wise man makes his own decisions, an ignorant man follows public opinion.