Blind zeal can only do harm. - (Lichtwer, Magnus Gottfried - Zeal)

Experience shows that success is due less to ability than to zeal. The winner is he who gives himself to his work body and soul. - (Buxton, Charles - Zeal)

I do not love a man who is zealous for nothing. - (Goldsmith, Oliver - Zeal)

Let a good person do good deeds with the same zeal that an evil person does bad ones. - (Rokeach, Shalom - Zeal)

Never let your zeal outrun your charity. The former is but human, the latter is divine. - (Ballou, Hosea - Zeal)

Through zeal, knowledge is gotten; through lack of zeal, knowledge is lost. - (Buddha - Zeal)

Too much zeal spoils everything. - (Proverb - Zeal)

Zeal is fit for wise men, but flourishes chiefly among fools. - (Tillotson, John - Zeal)

Zeal is like fire: it needs both feeding and watching. - (Proverb - Zeal)

Zeal is very blind, or badly regulated, when it encroaches upon the rights of others. - (Quesnel, Pasquier - Zeal)

Zeal without humanity is like a ship without a rudder, liable to be stranded at any moment. - (Felltham, Owen - Zeal)

Zeal without knowledge is fire without light. - (Fuller, Thomas - Zeal)

Zeal without knowledge is like expedition to a man in the dark. - (Newton, John - Zeal)

Zeal without knowledge is the sister of folly. - (Davies, Sir John - Zeal)

Zealous men are ever displaying to you the strength of their belief. while judicious men are showing you the grounds of it. - (Shenstone, William - Zeal)