The number one in Hebrew is pronounced `ehad and looks like this:
אחד
The first character is the Aleph, א, and represents God who is the one and should be number one in our lives.
The second character is the Chet, ח, and it represents an enclosed sacred place or more specifically the Holy of Holies or the place where God lives or His presence.
The last character is the Dalet, ד, and it represents man or you and I.
Hence, the number one in Hebrew symbolically means that the best way for man and God to become one is in the temple or the Holy of Holies. That is the best place for us to become one with our Heavenly Father and His Son Jesus Christ.
I love the explanations of the symbolic language of the Hebrew writing that you sporadically give to us. I think that this understanding of the language itself increases our faith in the Lord Jesus Christ and lets us be taught further by the spirit. Thank you!