What is the difference between intellectually knowing something, and emotionally

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What is the difference between intellectually knowing something, and emotionally knowing something? What I mean is, sometimes we know things rationally, but we haven't actually come to grips with it. Say a man's father died, and he, at first, reacts with apathy. "Oh, that's terrible," he says, but doesn't feel much. Then, when he sees his dead father lying in the coffin, it suddenly hits him, and he bursts into tears. He knew his father was dead all along, so what's different? Is it really just the visual impression, or are there different levels of knowledge in the mind?