Be not curious in unnecessary matters: for more things are shrewd unto thee than men understand. – Bible

Curiosity is lying in wait for every secret. – Ralph Waldo Emerson

Curiosity is only vanity. Most frequently we wish not to know, but to talk. We would not take a sea voyage for the sole pleasure of seeing without hope of ever telling. – Blaise Pascal, Pensées

Every man ought to be inquisitive through every hour of his great adventure down to the day when he shall no longer cast a shadow in the sun. For if he dies without a question in his heart, what excuse is there for his continuance? – Frank Moore Colby