Being Human

The question I have right now is "If Jesus is part of the trinity why did he  say certain things ????

1:  Jesus ask for the cup to be removed and he was that anxious he sweated drops of blood. BUT!!! he believed God had a plan for him.

2: On the cross he said Father why have you forsaken me. BUT!!! He knew his father would never forsake him. 

3: He didn't know when he would return

Jesus was human

Jesus didn't know