He that uses his words loosely and unsteadily will either not be minded or not understood.

Some eyes want spectacles to see things clearly and distinctly: but let not those that use them therefore say nobody can see clearly without them.

Whosoever is found variable, and changeth manifestly without manifest cause, giveth suspicion of corruption: therefore, always, when thou changest thine opinion or course, profess it plainly, and declare it, together with the reasons that move thee to change.

The only fence against the world is a thorough knowledge of it.

Virtue is everywhere that which is thought praiseworthy; and nothing else but that which has the allowance of public esteem is called virtue.

There cannot any one moral rule be proposed whereof a man may not justly demand a reason.

It is ambition enough to be employed as an under-labourer in clearing the ground a little, and removing some of the rubbish that lies in the way to knowledge.