Half-measures are always ruinous.

In matters of speculation one attempt is made safe by another.

No man, it is true, can calculate accurately what may be the upshot of a single venture; but a sharp fellow may calculate with a fair average of exactness what will be the aggregate upshot of many ventures.

All mercantile fortunes have been made by the knowledge and understanding of this rule.

If a man speculates but once and again, now and then, as it were, he must of course be a loser.