I understand by 'freedom of spirit' something quite definite - the unconditional will to say No, where it is dangerous to say No.
Friedrich NietzscheA heart full of courage and cheerfulness needs a little danger from time to time, or the world gets unbearable.
Friedrich NietzscheAs refined fare serves a hungry man as well as and no better than coarser food, the more pretentious artist will not dream of inviting the hungry man to his meal.
Friedrich NietzscheTo learn to see- to accustom the eye to calmness, to patience, and to allow things to come up to it; to defer judgment, and to acquire the habit of approaching and grasping an individual case from all sides. This is the first preparatory schooling of intellectuality. One must not respond immediately to a stimulus; one must acquire a command of the obstructing and isolating instincts.
Friedrich Nietzsche