He who learns must suffer' and that 'against our will comes wisdom through the awful grace' of enduring pain...

We must learn to suffer more.

God, whose law it is that he who learns must suffer, and, even in our sleep, pain that cannot forget falls drop by drop upon the heart, and in our despair, against our will, comes wisdom to us by the awful grace of God.

Only through suffering do we learn

Learning comes through pain.

We Can't learn without pain.

Beware of the man who works hard to learn something, learns it, and finds himself no wiser than before.

He who loves the more is the inferior and must suffer.

Those who act will suffer, suffer into truth

True knowledge comes only through suffering

To learn to succeed, you must first learn to fail.

Learning carries within itself certain dangers because out of necessity one has to learn from one's enemies.

Failure is a prerequisite to learning.

He who learns but does not think is lost. He who thinks but does not learn is in great danger.