CC Ādi 4.171

ataeva kāma-preme bahuta antara
kāma — andha-tamaḥ, prema — nirmala bhāskara
Synonyms: 
ataeva — therefore; kāma-preme — in lust and love; bahuta — much; antara — space between; kāma — lust; andha-tamaḥ — blind darkness; prema — love; nirmala — pure; bhāskara — sun.
Translation: 
Therefore lust and love are quite different. Lust is like dense darkness, but love is like the bright sun.