Although it is true that petros and petra can mean 'stone' and 'rock' respectively in earlier Greek, the distinction is largely confined to poetry.

You will find more saints are interested in antichrist than Christ.

As a Christian, I am responsible for the furniture of my mind.

For a Christian to say, "I will not have anything to do with the great and worthy works of artists whose lives were not good" is to fall into the impiety of questioning the wisdom of God in bestowing gifts of grace where He wills.

Although it is true that petros and petra can mean 'stone' and 'rock' respectively in earlier Greek, the distinction is largely confined to poetry.

The Greek makes the distinction between petros and petra simply because it is trying to preserve the pun, and in Greek the feminine petra could not very well serve as a masculine name.