"now while he was in Jerusalem at the Passover Feast, many people saw the miraculous signs he was doing and believed in his name. But Jesus would not entrust himself to them, for he knew all men. He did not need man's testimony about man, for he knew what was in a man." -John 2:23-25
why is it we want the approval of "people" or "man" so badly. even those of you that are saying, "i don't need the approval of people," are lying through your perfectly whitened teeth (why did you get your teeth whitened other than to try and fit some cultural norm that people with whiter teeth are well liked and/or more acceptable than those with stained and ragged teeth, and don't try to deny it because the whiteness of your teeth really has nothing to do with the function of your teeth in eating and chewing).
on a daily basis we do a number of things to find ourselves in the grace and acceptance of others and/or to "help" them be more receptive of us. i had a professor once say the most important thing a minister needed with him/her at all times was mints or gum. he would say you didn't want to have a chance to share the gospel with someone only to have them not hear a word you said due to your bad breath. i'm not trying to demonize this or say there is no value in fitting certain norms of culture (because of course Paul speaks of "becoming all things to all people").
i do however think we ignore them and become unaware of them to the point of blurring the line between pleasing people and pleasing God. in the verse from John we see Jesus had "no need for man's testimony" for he knew what was truly in the hearts of men. what is truly in the hearts of men? what is there about us, in what we say or do, or in what we look like, or the form we may or may not fit that can ever change what is truly in the hearts of men?
there is nothing. nothing about us can change what is truly in the hearts of men, in our own or others. a mint, a whiter tooth, a straighter bow-tie. nothing.
Jesus knew what was in the hearts of men, and during this Passover, he already knew that only a few short years later during another Passover these same people he would not "entrust" himself to would hand him over to be killed. Jesus did however entrust himself into the hands of the Father to please and follow Him with all His life.
it would be wise to remind ourselves what is truly in our hearts and in the hearts of the fickle and ever-changing people we at times so desperately try to please. keeping this in mind may make it that much easier to entrust our whole life to the only One that sees what is in our hearts and yet loves and gives himself for us anyway.