Bethel is the symbol of communion with God; Ai is the symbol of the world. Abraham pitched his tent between the two, knowing that the value of his public activity for God depended on the moments of profound private communion spent with him.
The two things—private worship and public work—went together in Abraham’s life, just as they did in the life of Christ. Too many of us think that in order to worship we have to drop out of our everyday lives, to flee Ai and go deep into Bethel, that quiet fortress where nothing and no one can disturb us.
This way of thinking may be a trap. There is always time to worship, no matter where we are or what we’re doing. Rush is wrong every time. Instead of jumping around like spiritual frogs, from working to waiting to worshipping, we should strive to live as Jesus did: unhurrying and unyielding, his entire existence an act of worship.
Worship is giving God the best he has given you. Be careful what you do with the best you have. If you try to keep a blessing for yourself, it will turn into spiritual rot, just as the manna rotted when the Israelites hoarded it (Exodus 16). Offer it back to God as a love gift, in a deliberate act of worship, and he will make it a blessing to others.

Wisdom from Oswald

Sincerity means that the appearance and the reality are exactly the same.
Studies in the Sermon on the Mount