A sharp tongue is the only edge tool that grows keener with constant use. Washington Irving
A tart temper never mellows with age, and a sharp tongue is the only edged tool that grows keener with constant use. Washington Irving
Conversation would be vastly improved by the constant use of four simple words: I do not know. André Maurois
Constant use had not worn ragged the fabric of their friendship. Dorothy Parker
They are learned by the constant use of the language and cannot be taught in any other fashion. Richard Hamming
Accustom yourself to master and overcome things of difficulty; for if you observe, the left hand for want of practice is insignificant, and not adapted to general business; yet it holds the bridle better than the right, from constant use. Pliny the Elder