Example Sentences:

Ramayana:  Although Ravana was lustful, he concealed it under the appearance of a sage who is generally expected to be guileless.

Mahabharata:  When the Pandavas first came to Hastinapura from the Himalayas, they had been guileless children; when they came the second time to Hastinapura from Drupada’s kingdom, they had become watchful warriors.  

Bhagavad-gita:  If we believe that our mind is guileless, it will soon impel us to act in ways that are senseless and shameless.