The soldier saints in the stunning medieval apse fresco (St. George on the far left, St. Sebastian on the far right) are a great illustration of the newly-translated Collect (opening prayer) heard at the beginning of yesterday's Ash Wednesday Mass:
Grant, O Lord, that we may begin with holy fasting
this campaign of Christian service,
so that, as we take up battle against spiritual evils,
we may be armed with weapons of self-restraint.
You can follow the "march" of this daily Lenten pilgrimage at a distance (or even up close--maps are included!) on the website of the Pontifical North American College.