The man who saves time by ...

The man who saves time by galloping loses it by missing his way; the shepherd who hurries his flock to get them home spends the night on the mountain looking for the lost; economy does not consist in haste, but in certainty.
 Ramsay MacDonald

Quotes from the same author

We shall never be able to effect physical disarmament until we have succeeded in effecting moral disarmament.
 Ramsay MacDonald