From the minute Celtic's placing in Group C brought gasps of child-like excitement, a note of realism has underpinned their every step.
After a three-year absence from the Champions League, few were of a mind to quibble about the colossal tasks awaiting them. This year has primarily been about being on an educational journey.
But just because most would privately bite your hand off for a Europa League slot right now isn't to say the towel has yet landed in the ring as far as finishing second in the group is concerned.
Barcelona, who come to Glasgow on November 23, would present the most menacing threat at the best of times.