John 8:18-19 WEB
I am one who testifies about myself, and the Father who sent me testifies about me.”  They said therefore to him, “Where is your Father?” Jesus answered, “You know neither me, nor my Father. If you knew me, you would know my Father also.”
When Jesus says the Father testifies about him, he is referring to the many miracles he performed. It is clear in the text the Father approved of Jesus (John 3:2). The Father often released his power when Jesus asked it of him. So, if Jesus was openly approved of by the Father, can you and I be openly approved of by the Father (Rom 16:10)?
How can we tell in the modern age if the Father approves of someone? First, there are still miracles happening and they tend to be performed by people who are fully invested in God (Heb 2:4). They also meet specific needs. For example, missionaries often report they have experienced the miraculous.
So, a powerful move of God can show his approval. However, not many miracles are happening. How can we tell in the modern age if God approves of someone? You must know the Bible. Someone whose life is in line with the principles and precepts of the Bible is approved by God (1 Kings 11:38).
By extension, knowing the Bible and living it to the best of your ability is proof that you are accepted by God. If I do not know the Bible, I may be subject to the wrong teaching. I may be deceived. So, no matter the denomination, you can test yourself by asking yourself how much of the Bible you are living. This will help you understand if you are approved by God.
Lord Jesus, I want to be approved of by you. Please help me comprehend and learn the principles and precepts of the Bible. Lead me into righteous and holy living. In Jesus’ name, I pray, amen.