खल - साधु भेदः

विद्या विवादाय धनं मदाय

    शक्तिः परेषां परिपीडनाय ।

खलस्यः साधोः विपरीतं

    एतद् ज्ञानाय दानाय च रक्षणाय ॥

A wicked man uses his education for needless argument, money to indulge and strength to hurt others. In contrast a virtuous person uses them for aquiring new knowledge, charity and protecting the weak reaspectively.