Ignorance is the night of the mind, but a night without moon or star."
"He who learns but does not think, is lost! He who thinks but does not learn is in great danger."
"The essence of knowledge is, having it, to apply it; not having it, to confess your ignorance."
The expectations of life depend upon diligence; the mechanic that would perfect his work must first sharpen his tools.
He does not preach what he practices till he has practiced what he preaches.