CC Madhya 16.239

antare niṣṭhā kara, bāhye loka-vyavahāra
acirāt kṛṣṇa tomāya karibe uddhāra
Synonyms: 
antare — within the heart; niṣṭhā kara — keep strong faith; bāhye — externally; loka-vyavahāra — behavior like ordinary men; acirāt — very soon; kṛṣṇa — Lord Kṛṣṇa; tomāya — unto you; karibe — will do; uddhāra — liberation.
Translation: 
Śrī Caitanya Mahāprabhu continued, “Within your heart you should keep yourself very faithful, but externally you may behave like an ordinary man. Thus Kṛṣṇa will soon be very pleased and deliver you from the clutches of māyā.