
On Thinking for Oneself

This is why much reading robs the mind of all elasticity; it is like keeping a spring under a continuous, heavy weight. If a man does not want to think, the safest plan is to take up a book directly he has a spare moment.
Arthur Schopenhauer • The Collected Essays of Arthur Schopenhauer (Unexpurgated Edition) (Halcyon Classics)
William Deresiewicz • Solitude and Leadership
When I hear of these portents of learning and their imposing erudition, I sometimes say to myself: Ah, how little they must have had to think about, to have been able to read so much!
Arthur Schopenhauer • The Collected Essays of Arthur Schopenhauer (Unexpurgated Edition) (Halcyon Classics)
Too much importance cannot be attached to this quality of seeing things for oneself; it is the stamp of a great and original mind; it is the principal quality of what one calls genius.
Arthur Schopenhauer • Works of Arthur Schopenhauer

Every one has aims, but very few have anything approaching a system of thought. This is why such people do not take an objective interest in anything, and why they learn nothing from what they read: they remember nothing about it.