Teaching is one of the noblest of professions. It requires an adequate preparation and training, patience, devotion, and a deep sense of responsibility. Those who mold the human mind have wrought not for time, but for eternity.
Calvin CoolidgeSurprisingly few men are lacking in capacity, but they fail because... they are too indolent to apply themselves with the seriousness and the attention that is necessary to solve important problems.
Calvin Coolidge