AC Milan midfielder Honda fired Alberto Zaccheroni's team into a 16th-minute lead during their Group C opener against Cote d'Ivoire in Recife but two goals in as many second-half minutes from Gervinho and Wilfried Bony handed the African nation a 2-1 win.
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"I think there were a few causes (for the defeat) but especially I think we might have respected the opponents too much," the 28-year-old told reporters.
"It means that our consciousness to take the opponents' strengths away might be bigger than the one to show our own strong points.
"Yes, playing aggressively is what we have built up and it is our belief and fundamental for our confidence. There were some dangerous players of Ivory Coast and there are some of Greece too and we need to show the respect to them but it is better not to show it too much."
Greece also came off second best at the hands of Colombia in their first match, meaning the price of failure next time out is high for both teams, yet Honda refused to entertain such negative thoughts.
"Although we have our back to the wall, our confidence is still solid," Honda said.
"Being eliminated from the competition may be coming up in discussion but I never have such an idea and all I am thinking about is to win over Greece and to prepare for the game after, against Colombia."