To attain knowledge, add things every day. To attain wisdom, remove things every day. Laozi
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
As it is not possible to walk without feet or fly without wings, so it is impossible to attain the Kingdom of Heaven without the fulfillment of the commandments. Theophan the Recluse
Belief is nothing but a more vivid, lively, forcible, firm, steady conception of an object, than what the imagination alone is ever able to attain. David Hume
Piety is not an end but a means to attain by the greatest peace of mind the highest degree of culture. Johann Wolfgang von Goethe
Serve even an unbeliever to attain your own ends. Swahili Proverb