And this is why it is so important to understand the entire Gospel. Over the last sixty years or so it has been slowly watered down to the silly "your best life now" version of today. In some corners of the world, the Christian religion has been made a cultural artifact, devoid of any personal relationship with God, full instead of ritual, and hierarchy, and tradition.
No one is good enough to deserve fellowship with God. He gives it to us because He is a good and loving God, not because there is something desirable, something good, in us. So, the person who feels they are not good enough for God is simply recognizing the truth. But, wonderfully, this is no barrier to God loving us and relating with us. Because He is good and loving, He reaches down to us in our sin and corruption and offers us new life in His Son.
To know you're saved is a joy, a great, great joy and a well-spring of deep peace.
Revelation 3:20
20 Behold, I stand at the door and knock. If anyone hears My voice and opens the door, I will come in to him and dine with him, and he with Me.
Selah.