Which edit to these sentences is necessary to correct a writing error?

evertheless he ought to be slow to believe and to act, nor should he himself show fear, but proceed in a temperate manner with prudence and humanity, so that too much confidence may not make him incautious and too much distrust render him intolerable.

explanation:

the negative way that it shaped life was by having a feudal system where only the nobles and the christian church while it was oppressive to the peasants and specially to women. the positive way that it shape life is by introducing the artisan class when the feudal system fell. it change the attitudes towards religion and it also introduced what was known as knightly chivalry.

-hope this : )