Learning is like bank-notes: prudence and good behaviour are like silver, useful upon all occasions. - James Burgh

If you mean to make your side of the argument appear plausible, do not prejudice the people against what you think truth by your passionate manner of defending it.

Never offer advice but where there is some probability of its being followed.

Men repent speaking ten times, for once that they repent keeping silence. It is an advantage to have concealed one's opinion; for by that means you may change your judgment of things (which every wise man fmds reason to do) and not be accused of fickleness.