Ecclesiastes is a fountain of words, it takes the meek and cognisant to appropriately extract the right words with their power. So i stumbled on these words,
"10:17 Blessed are you, O land, when your king is the son of nobles, and your princes feast at the proper time, for strength, and not for drunkenness!"
It defines what drunkeness entails. Whereas the societal definition would include the taking of alcoholic beverages in large amounts; that of this text and i am convinced also of God is that it is an intake of any worldly thing for reasons of merry and idleness. Thus, television, games, jokes, food, rest, when overdone and done in the 'early' hours and not for need but for want, reduce one's ability to address responsibility and thus become a drunkaard.
This is why Christ then urges us to be diligent all the time, because often we assume we stand, when in fact we are fallen. We must be indignant of the ways of this world, for they are treacherous and beguiling. So i urge you to be very diligent of the stick you use to measure your righteousness, lest you fall thinking you stand.