CC Antya 2.117
dekhite nā pāroṅ āmi tāhāra vadana
The Lord replied, “I cannot tolerate seeing the face of a person who has accepted the renounced order of life but who still talks intimately with a woman.
Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura comments that saralatā, or simplicity, is the first qualification of a Vaiṣṇava, whereas duplicity or cunning behavior is a great offense against the principles of devotional service. As one advances in Kṛṣṇa consciousness, one must gradually become disgusted with material attachment and thus become more and more attached to the service of the Lord. If one is not factually detached from material activities but still proclaims himself advanced in devotional service, he is cheating. No one will be happy to see such behavior.