The word does not say Catholic though.
The church the bible speaks of is the body of believers known as Christians.
The words from our Lord Jesus are the final authority. Anybody who thinks their church denomination they belong to, or that a man like the pope has the right to override His words and teaching then you have been brought into a falsehood.
The word does say we are saved by grace through faith, the word also says that faith without works is a dead faith.
Lord Jesus says if you love Me you will keep my commandments, and why do you call Me Lord if you don't do as I say.
If Jesus is your Lord and Savior you would do as He said.
He said you have to repent of sins or parish, He said confess Him before others and He will confess you before the Father; If you deny Him before others He will deny you, He commanded baptism in Mark 16 and Matthew 28, and He said if refuse to help others in need then you have refused Him.
In loving the Lord your God with all your heart, soul, and mind you will do the these things and thus be living by the greatest commandment. Then in turn you will also do the second command, to love your neighbor as yourself. Jesus even stated you will also love your enemies if you follow Him, because this He also taught.