It is impossible for us to grasp the greatness of God. It is simply beyond our comprehension. However, God's word give us some really amazing insight into his character.
In the Old Testament very few people were allowed into God's presence in the Holy of Holies because God is just that- Holy.
Now, because of Christ's blood, that veil separating the Holy Place from the Holy of Holies has been torn in two. Jesus is our High Priest, and because of that we have access to the Father. This doesn't make God less Holy. It just means that because of Christ's blood those barriers have been removed.
In God's presence are glory, honor, strength, gladness, and a host of other wonderful characteristics. Our God is truly awesome. We can see that in creation, at Calvary, at the Garden tomb, and in our own lives.
God wants very much to be involved in our lives. He wants to be included in every aspect our our marriages, families, careers, etc. God is Great. He cares for us- each individually - even with all of our fears and failures. He can see to finished product in us. Will you let him have a primary place in your life. Give him your cares and concerns. He loves us and wants a relationship with each and every one of us.