Do not be quick to talk about three things: about God until you establish faith in Him, about another's sin until you remember your own and about tomorrow until you see the dawn. Nikolaj Velimirovic
Strive to attain to the greater virtues, but do not neglect the lesser ones. Do not make light of a fall even if it be the most venial of faults; rather, be quick to repair it by repentance, although many others may commit a large number of faults, slight and grievous, and remain unrepentant. Basil of Caesarea
Be quick to learn and wise to know. George Burns
In bad things be slow; in good things be quick. Afghan Proverb
Be quick to follow up an advantage. New Zealander Proverb
When the river is filled, Be quick to fetch some into your bucket. Thai Proverb