Yoga Sūtra Chapter One verse 6

प्रमाणविपर्ययविकल्पनिद्रास्मृतयः ॥६॥

pramāṇa-viparyaya-vikalpa-nidrā-smṛtayaḥ ||6||

They are right perception, wrong perception, imagination,
deep sleep and memory.

pramāṇa - right perception, a correct notion; a means of acquiring; measure, scale, standardviparyaya - wrong perceptionvikalpa - imaginationnidrā - deep sleepsmṛti - remembrance; memory; mindfulness; the whole body of sacred tradition or what is remembered by human teachers and constantly revised

Commentaries and Reflections

T Krishnamacharya:

“What is the true nature of the Citta?”

TKV Desikachar:

“Sleep (Nidrā) and Samādhi are the only times when there is no ‘I’.”

Paul Harvey:

“The five groups are
right perception,
wrong perception,
imagination,
deep sleep and
remembrance.”

Inspirational Quote

“Common sense is the knack of seeing things as they are, and doing things as they ought to be done....” Harriet Beecher Stowe