Seek God according to His commandments
There is a way to worship Him. We can only worship Him in the way God has given us. There are no new ways of doing this, there are no new teachings of the Holy Spirit on this, for just as Jesus said that the Holy Spirit does not speak his own, but what Jesus said (John 16:13).
The first time Moses had to strike the rock, the second time they had to ask. It doesn’t seem like a big difference, as it had to be struck for the first time, and the end result is the same: it became water for the people. Yet this was a big difference before God so much that God did not allow Moses and Aaron into the land of promise.
Why did God appear on the mountain? To give His law to the people! And why did He appear in a fire? Because what comes from this world cannot survive the fire of God. Because there is nothing in this world that can survive in the presence of God! Therefore, we either obey His word and may have fellowship with God, or we disobey, but then His fire consumes us.
His Word is eternal
Although many believe that the Father has changed since Jesus' death and resurrection. But if God had really changed, He can change anytime again, and then our faith would not be rock solid. But the good news is that God does not change, although for many it is bad news and judgment at the same time.