It is another's fault if he be ungrateful, but it is mine if I do not give. To find one thankful man, I will oblige a great many that are not so.
Of war men ask the outcome, not the cause.
Gold is tried by fire, brave men by adversity.
Demand not that I am the equal of the greatest, only that I am better than the wicked.
Time hath often cured the wound which reason failed to heal.
You have to persevere and fortify your pertinacity until the will to good becomes a disposition to good.