The tendency of old age to the body, say the physiologists, is to form bone.
It is as rare as it is pleasant to meet with an old man whose opinions are not ossified.
The world is burdened with young fogies.
Old men with ossified minds are easily dealt with. But men who look young, act young and everlastingly harp on the fact that they are young, but who nevertheless think and act with a degree of caution that would be excessive in their grandfathers, are the curse of the world. Their very conservatism is secondhand, and they don't know what they are conserving.
The phrases that men hear or repeat continually, end by becoming convictions and ossify the organs of intelligence.
Constant revolutionizing of production distinguish the bourgeois epoch from all earlier ones. All fixed, fast-frozen relations, with their train of ancient and venerable prejudices are swept away, all new-formed ones become antiquated before they can ossify. All that is solid melts into air, all that is holy is profaned, and man is at last compelled to face with sober senses, his real conditions of life, and his relations with his kind.