This proverb has to taken in right context,
this is only true if आशय are followed with अज्ञान and not based on The Absolute Truth Of Existence,
Wise Souls always remind us to be aware of context and अज्ञान is not virtue,
Thought formations are true (relatively) in their own context,
The Absolute Truth of Existence cannot be expressed completely in perception, emotion, thought and even experience at मानवीय स्तर प्रज्ञा,
If thoughts true in one context are forced onto another who lives in another context,
then the entire eco-system suffers with regression of freewill,
Progress cannot be forced from outside,
Progress needs to be inspired, taken effort and guided by the Lord from within.
But to understand the Absolute Truth at deeper level,
Saints have to transcend pious and impious through non-attachment to and non-judgement of evil and even good.
The Absolute Truth is || एकमेवाद्वितीयम् || - || अहं ब्रह्मास्मि || - is every living entity is just trying to exist-existence and be aware of its own existence प्रज्ञा and be joyful and at state of शान्ति or content.
विज्ञान is structured in प्रज्ञा - Maharishi Mahesh Yogi