Why do Orthodox call priests 'father' when Christ said call no man father?
Any time somebody sees people call me Father Moses, they quote, call no man father. But the context matters. Christ also says call no man teacher, and we call people teachers all the time. And the word in the original is not simply father: Christ is using the word abba. The bishop pointed out that Christ doesn't even call himself father. He calls only God his Father.
Yet Christ was the father of the apostles, though he never claimed the title, and the apostles were the fathers of the next generation of disciples. That is the apostolic succession, so this is not outside the tradition. Even St Paul says in his epistle, I have become your father, I have begotten you. So the essence of what Christ is saying is not that we have no one earthly we call father.
Obviously we have dads and we call them dad, and father and dad are basically interchangeable. People think the word father is some magical variation on dad. The essence is: do not be connected to anyone in such a way that you're more connected to them than you are to your heavenly Father. As the bishop put it, the fathers of the church should never try to connect people with themselves, but with God.
His own elder was his father because through his prayers he found spiritual rebirth, but the elder never claimed that title for himself. He would lead him to Christ.
Matthew 23:9 · 1 Corinthians 4:15

