There really is no cost, only the privilege of serving the King of Kings.
God never uses a person greatly until He has wounded him deeply. The privilege He offers you is greater than the price you have to pay. The privilege is greater than the price.
We are called to reflect the Lord's beauty through our lives as much as through our words, and God will use this in His own perfect time.
There must be nothing in my daily conduct that, copied by another, could lead that one into unholiness.