Tricks and treachery are the practice of fools that don't have brains enough to be honest.

Dally not with other folk's spouses or money.

Avoid dishonest gain: no price can recompence the pangs of vice.

I grew convinced that truth, sincerity and integrity in dealings between man and man were of the utmost importance to the felicity of life, and I formed written resolutions . . . to practice them ever while I lived.

Let honesty and industry be thy constant companions, and spend one penny less than thy clear gains; then shall thy pocket begin to thrive; creditors will not insult, nor want oppress, nor hungerness bite, nor nakedness freeze thee

Do not, however, mistake me. It is not to my good friend's heresy that I impute his honesty. On the contrary, 'tis his honesty that brought upon him the character of a heretic.