John 2

24But Jesus would not entrust himself to them, for he knew all men. 25He did not need man's testimony about man, for he knew what was in a man.

When Jesus was in Jerusalem for passover, many people belived in him. But Jesus did not entrust himself to the people. The reason therfore was because he knows what was in man. When we look back in Genesis, God already discribed what is in man.
"Gen 8:21 21 The LORD smelled the pleasing aroma and said in his heart: "Never again will I curse the ground because of man, even though every inclination of his heart is evil from childhood."
As every inclination of a mans heart is evil from childhood we are here told of a bad idea of man (Menschenbild/ concept of man). But even if every man is sinful and evil the same verse shows clearly that God still do not want their distruction. That is also the reason why he gave us a way to salvation.

Now as we are not God I think that we should neither say that man is good or evil. Cause if we say that they are good than we say something contraversial to what God has just said.(And I think that, there are not many people who belive in a good idea of man, besides Kommunists:). But when we say that man is evil, we condemn all people who God created and loves. What we can do is being aware that we as human being are weak, especially our will to do good (which means to do as God pleases) and that we fall short of the glory of God (Rom 3:23) and being willing to develop a heart that inclines to God. But if we see others doing wrong (as far as we can judge the situation) we should not be too angry or upset. Rather is it that we feel sad that someone is not able to incline his or her heart to God (We also know that Jesus felt compassion for the sick and weak people.
"Mt 34:34 So Jesus had compassion on them, and touched their eyes: and immediately their eyes received sight, and they followed him."
Jesus already said it when he was on earth that we should love and pray for each other. Because whats the point if you sue your borther or sister before the judge? It would be much more helpful if you pray for that person or help him in some other way. Cause if you do not do that you might be (a bit) responsible for someones bad doing. Of course when we did our best and the person does not listen wehave done our duty.

This was the reason why Jesus did not entrusted himself to them. But than I just asked myself what does in mean „to entrust oneself“ (sich jemandem anvertrauen)? And the dictionary told me that it means so reveal a secret to a trusted person. I think in this case it would be the gospel and things like the one in the book of revelation. Because later Jesus did entrust his discples and also us through the bible with the gospel,
"1 Timothy 1:11 that conforms to the glorious gospel of the blessed God, which he entrusted to me."
or the with God´s work.
"Titus 1:7 Since an overseer is entrusted with God's work "
The parable of the talents is also dealing this the same topic. Here a man entrusted his property to his servants (Matthew 25:14).

At first I thought that when Jesus spoke about entrusting himself to us that this would be the giving of the promised Holy Spirit. But after some research I think that the Holy Spirit can not be entrusted to us because it is living with us and in us. The Holy Spirit is God´s spirit and we can accept it but we have not the power to, for example share it with other people. Everone has to aks God directly for this gift. Also is the possible arrow of influence between us and the Holy Spirit always from him to us. Although we can cut this influence we will not be able to influence him or change him.
"2 Timothy 1:14 Guard the good deposit that was entrusted to you—guard it with the help of the Holy Spirit who lives in us."
After this veres we know that the Holy Spirit lives in us but when we look back to the paragraph before we might easily ask: why is the gospel now entrusted to us? We are still human why now?
Now this verse also shows us why maybe Jesus entrused us with the gospel. It is because Holy Spirit will and can help us to guard it. Otherwise it might be picked away by the birds.