God is so holy that no one can literally look at Him and live (Genesis 33:20). However, there is a way for the nature of God to be revealed to us:
“No one has ever seen God, but the one and only Son, who is himself God and is in closest relationship with the Father, has made him known.” (John 1:18 NIV)
We can see what God is like by observing the written record of Jesus’ Christ. Jesus is God, but took on flesh so that he could walk among us humans without us being struck dead by His glory. Those who want to know what God is like need to read the gospels.