This made the Jews more determined than ever to kill Him [to do away with Him]; because He not only was breaking (weakening, violating) the Sabbath, but He actually was speaking of God as being [in a special sense] His own Father, making Himself equal [putting Himself on a level] with God. John 5:18
Jesus called God His Father, and by saying that He was, meant that He was making Himself equal with God.
And He said to them, When you pray, say: Our Father Who is in heaven, hallowed be Your name, Your kingdom come. Your will be done [held holy and revered] on earth as it is in heaven. Luke 11:2
Jesus tells you to call God your Father too. So, Jesus is telling you to confess that you are equal with God. Think about it, how could you be anything less? You are now one with Him. How could you be part of God and not equal with Him? Is your arm not part of you and equal with you? Is your heart not part of and equal with you?
I in them and You in Me, in order that they may become one and perfectly united, that the world may know and [definitely] recognize that You sent Me and that You have loved them [even] as You have loved Me. John 17:23
At that time [when that day comes] you will know [for yourselves] that I am in My Father, and you [are] in Me, and I [am] in you. John 14:20
