Is Domestic Domination the Only Focus for Celtic?

Celtic swept aside Aberdeen mid week stay top of the domestic pile. Hours later, the transfer window slammed shut, and fans were divided by the outcome. 10 players in total walked into Parkhead, with the quality largely being unquestionable. However, failure to secure a priority big ticket target, and recent comments from our manager have left many wondering if domestic dominance is still the be-all, end-all for those who run out club...