Who can understand his errors? cleanse you me from secret faults.
Now, as a man may deal with a tree, so he may deal with his sins; the axe may be employed only to lop off the branches, which yet all live in the root, and he may apply his axe to the very root, to the cutting of it up, and so he brings an universal death to the tree: so it is possible for a man to bestow all his pains to lop off sin only in the visible branches in the outward limbs of it, and it is also possible for a man to be crucifying the secret lust, the very corrupt nature and root of sinfulness. Now, this! say, he who bestows his study, his prayers, his tears, his cares, his watchings, his strength to mortify corruption in the root, in the nature, in the cause, how unquestionable is it that he doth desire to be cleansed from secret sins.
(O. Sedgwick, B. D.)
Parallel VersesKJV: Who can understand his errors? cleanse thou me from secret faults.