Never ascribe to malice that which is adequately explained by incompetence.

Don’t attribute to malice
what can be explained by incompetence.

Never attribute to malice that which can be adequately explained by stupidity, but don't rule out malice.

Never attribute to malevolence what is merely due to incompetence

Never attribute to malice what can be explained by stupidity. Don’t assign to stupidity what might be due to ignorance. And try not to assume your opponent is the ignorant one — until you can show it isn’t you.

Malicious men may die, but malice never.

Do not make excuses, whether it's your fault or not.

Nunca atribua à malícia o que pode ser adequadamente explicado pela burrice.

Do not impute to money the faults of human nature.

Never judge someone based on what you've heard.

Never complain, never explain. Resist the temptation to defend yourself or make excuses.

Never confuse faith, or belief — of any kind — with something even remotely intellectual.

Never take counsel of your fears.

Never make excuses. Your friends don't need them and your foes won't believe them.