As every divided kingdom falls, so every mind divided between many studies confounds and saps itself.

Time stays long enough for anyone who will use it.

Those who, in debate, appeal to their qualifications, argue from memory, not from understanding.

He who cannot establish dominion over himself will have no dominion over others.

Tears come from the heart and not from the brain

All our knowledge has its origins in our perceptions.

Poor is the pupil who does not surpass his master.