Lacking that, misconceptions (vritti) skew our perceptions. ||4||

Verse 4 

वृत्ति सारूप्यमितरत्र ॥४॥

vr‌tti sārūpyam-itaratra ॥4॥

vr‌tti = waves; changes; thought waves; lack of clarity

sā = similar

rūpyam = form

sārūpyam = similar form, as opposed to proprietary form of svaruupa . In other words, we identify with something that is merely similar to our true nature, thus engendering a skewed perception.

itara = different

itaratra = in other states

Lacking that, misconceptions (vritti) skew our perceptions. ||4||

PATANJALI YOGA SUTRAS