'Age' in the Bible

where is the wise? where the scribe? where a disputer of this age? did not God make foolish the wisdom of this world?

And wisdom we speak among the perfect, and wisdom not of this age, nor of the rulers of this age -- of those becoming useless,

which no one of the rulers of this age did know, for if they had known, the Lord of the glory they would not have crucified;

Let no one deceive himself; if any one doth seem to be wise among you in this age -- let him become a fool, that he may become wise,

and if any one doth think it to be unseemly to his virgin, if she may be beyond the bloom of age, and it ought so to be, what he willeth let him do; he doth not sin -- let him marry.

wherefore, if victuals cause my brother to stumble, I may eat no flesh -- to the age -- that my brother I may not cause to stumble.