Simplify the following text for a Grade 13 native English-speaking person.
Original: The Institutes , together with Calvin 's polemical and pastoral works , his contributions to confessional documents for use in churches , and his massive outpouring of commentary on the Bible , meant that Calvin had a direct personal influence on Protestantism .
Simplified: Together with his contributions to confessional documents for use in churches it founded the direct personal influence on Protestantism of Calvin .