The Heart (n.) keeps its folds sticking together, and to open it one would have to keep tearing them apart.
The Heart (n.) is said to be closed to others' looking, and the real assumption is that its owner can look into it.
The Heart (n.) has folds that keep sticking together; to open it he had to keep tearing them apart.
The Heart (n.) is meant when we say in my heart I understood it and point to our chest — not used knowingly as a picture.
The Heart (n.) glowing with love is a paraphrased expression of an experience, like the experience a-quiver with future application.
The Heart (n.) in the words In my heart I understood, with a hand pointing to it, is not a figure we choose and not a simile, and yet it is a figurative expression.