There is no way to face the great advantages of another person than through love.

Sin writes histories, goodness is silent.

Investigate what is, and not what pleases.

It is better to be deceived by one's friends than to deceive them.

Help me to discover Thy truth, O Lord, and preserve me from those who have already found it

Should I not be proud, when for twenty years I have had to admit to myself that the great Newton and all the mathematicians and noble calculators along with him were involved in a decisive error with respect to the doctrine of color, and that I among millions was the only one who knew what was right in this great subject of nature?

There is nothing so terrible as activity without insight.