"However, those the Father has given me will come to me, and I will never reject them. For I have come down from heaven to do the will of God who sent me, not to do my own will."
Everything we saw the Jesus do we know was the will of the Father. God's will is revealed in Jesus Christ. He will heal the sick. He will forgive the sinner. He will save the lost. He will calm the storms. He will never reject those who belong to him. Whatever we have seen Jesus do we know the Father does for Jesus only does that which his Father wills. He is the perfect picture of the Father and no one knows the Father except through Jesus Christ.
Without Jesus, the Father is vastly misunderstood. People are quick to interpret who God is by what God does instead of letting who God is interpret what God does. If God chooses to bring calamity on a person, you could forget the context and just conclude that God is cruel and punishing. It's the Fundamental attribution error at work. Once you understand that God is loving and just, you will understand why calamity was brought upon the wicked: So that the righteous might be spared from their schemes.
But if you don't understand who Jesus is, you don't know the Father. And he wants to be known and has chosen to reveal himself to all he has given to Christ.