Thayer's Greek Lexicon

 1. to have understanding, be wise
2. to feel, to think
  1) to have an opinion of one's self, think of one's self, to be
modest, not let one's opinion (though just) of himself exceed
the bounds of modesty
  2) to think or judge what one's opinion is
  3) to be of the same mind i.e. agreed together, cherish the same
views, be harmonious
3. to direct one's mind to a thing, to seek, to strive for
  1) to seek one's interest or advantage
  2) to be of one's party, side with him (in public affairs)