I have two more quotes from the amazing Counter Reformation reformer, Teresa of Avila – a most unusual source for a Calvinist!
If I were to give advice, I would say to parents that they ought to be very careful whom they allow to mix with their children when young; for much mischief thence ensues, and our natural inclinations are unto evil rather than unto good.
She understood sin. The other quote which really puts our brokenness into perspective:
I am quite certain that great evils would be avoided if we clearly understood that what we have to do is, not to be on our guard against men, but on our guard against displeasing Thee.