Bhagavad Gita Chapter 03, Text 25

Bg 3.25

saktah karmany avidvamso
yatha kurvanti bharata
kuryad vidvams tathasaktas
cikirsur loka-sangraham

Word for word: 
saktah — being attached; karmani — in prescribed duties; avidvamsah — the ignorant; yatha — as much as; kurvanti — they do; bharata — O descendant of Bharata; kuryat — must do; vidvan — the learned; tatha — thus; asaktah — without attachment; cikirsuh — desiring to lead; loka-sangraham — the people in general.

Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
As the ignorant perform their duties with attachment to results, the learned may similarly act, but without attachment, for the sake of leading people on the right path.

Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
A person in Krishna consciousness and a person not in Krishna consciousness are differentiated by different desires. A Krishna conscious person does not do anything which is not conducive to development of Krishna consciousness. He may even act exactly like the ignorant person, who is too much attached to material activities, but one is engaged in such activities for the satisfaction of his sense gratification, whereas the other is engaged for the satisfaction of Krishna. Therefore, the Krishna conscious person is required to show the people how to act and how to engage the results of action for the purpose of Krishna consciousness.