Many able Gardeners and Husbandmen are yet Ignorant of the Reason of their Calling; as most Artificers are of the Reason of their own Rules that govern their excellent Workmanship. But a Naturalist and Mechanick of this sort is Master of the Reason of both, and might be of the Practice too, if his Industry kept pace with his Speculation; which were every commendable; and without which he cannot be said to be a complete Naturalist or Mechanick.
William PennIf thou wouldst be happy, bring thy mind to thy condition, and have an indifferency for more than what is sufficient.
William PennFor nothing reaches the heart but what is from the heart, or pierces the conscience but what comes from a living conscience
William Penn