- Blind zeal can only do harm.~ Magnus Gottfried Lichtwer
- 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.~ Charles Buxton
- He that does a base thing in zeal for his friend burns the golden thread that ties their hearts together.~ Jeremy Taylor
- I do not love a man who is zealous for nothing.~ Oliver Goldsmith
- Let a good person do good deeds with the same zeal that an evil person does bad ones.~ Shalom Rokeach
- Never let your zeal outrun your charity. The former is but human, the latter is divine.~ Hosea Ballou
- Through zeal, knowledge is gotten; through lack of zeal, knowledge is lost.~ Buddha
- Too much zeal spoils everything.~ Traditional Proverb
- When you are laboring for others let it be with the same zeal as if it were for yourself.~ Confucius
- Zeal is fit for wise men, but flourishes chiefly among fools.~ John Tillotson
- Zeal is like fire: it needs both feeding and watching.~ Author Unknown
- Zeal is very blind, or badly regulated, when it encroaches upon the rights of others.~ Pasquier Quesnel
- Zeal is very blind, or badly regulated, when it encroaches upon the rights of others.~ Pasquier Quesnel
- Zealous men are ever displaying to you the strength of their belief. while judicious men are showing you the grounds of it.~ William Shenstone
- Zeal without humanity is like a ship without a rudder, liable to be stranded at any moment.~ Owen Felltham
- Zeal without knowledge is fire without light.~ Thomas Fuller
- Zeal without knowledge is like expedition to a man in the dark.~ John Newton
- Zeal without knowledge is the sister of folly.~ Sir John Davies


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