Whatever dims thy sense of truth Or stains thy purity, Though light as breath of summer air, O count it sin to thee. Preserve the tablet of thy thoughts From every blemish free, For our Redeemer???s holy faith Its temple makes with thee. And pray of God, that grace be given To tread the narrow way: How dark so ever it may seem, It leads to cloudless day.
https://primoaccordo.net/hymns/whatever-dims-thy-sense-of-truth.htm