In his extraordinarily useful book A Method for Prayer, Matthew Henry includes a large section on repentance, which begins with these words:
Having given glory to God which is his due, we must next take shame to ourselves, which is our due, and humble ourselves before him in the sense of our sinfulness and vileness…
With many examples, he demonstrates effective prayers of repentance. To the modern reader, what may stand out the most is the acknowledgement of sin’s evil. It’s one thing to admit we’re sinners and name our sins before God. It’s equally important to stare at those sins long enough to own and feel our shame as well as our guilt. (Henry says we are to “aggravate” or poke at them until we see them for what they really are.)
Toward that end, here are two aspects of the evil-ness of our sin which God has recently shown me very clearly.