रामायण - अयोध्या

गुरुलाघवमर्थानामारंभे कर्माणां फलम् ।
दोषं वा यो न जानाति स बाल इति होच्यते ॥

- रामायण, अयोध्या

Before starting on an endeavor if one does not analyze the outcome of his actions in terms of profit-loss, good-bad then he can only be branded as foolish (or naive).

- Ramayana, Ayodhya