Zeno would also say that

nothing is more hostile

to a firm grasp on knowledge than self-deception.

 

—Diogenes Laertius, Lives of the Eminent Philosophers, 7.23, (resource) Ryan Holiday, The Daily Stoic

www.myINSPIRATIONALquotes.net

The Daily Stoic: 366 Meditations on Wisdom Perseverance and Art of Living

(Book Overview | Download here | View Collections | FREE References)