Sorrow and melting of heart fits us for every holy duty. A piece of lead, while it is in the lump, can be put to no use, but melt it, and you may then cast it into any mould, and it is made useful. So a heart that is hardened into a lump of sin is good for nothing, but when it is dissolved by repentance, it is useful.
– Thomas Watson –
from The Doctrine of Repentance, 1668