You can't interpret something without a standard to compare it to. In the Church it is the Holy Tradition, based on Church records and mindset that was much closer to the original Christianity.
In the Protestant world it is whatever they "feel" inside, a perusal tradition of sorts, how they were raised, how healthy and wealthy they are, the language they speak, the culture they embrace, etc.
If the Biblical Greek and the Holy tradition are not sued as standards, then anything goes.
perusal=personal
If Holy tradition is used as a standard, then anything goes.