Thomas, thou hast believed: Blessed are they that have not seen, and have believed. Many other signs also did Jesus in the sight of His disciples, which are not written in this book. But these are written that you may believe that Jesus is the Christ the Son of God: and that believing, you may have life in His name.
Why does Jesus so often say, " Peace be to you "? To signify that He had restored peace between God and man; to show how men might know His disciples; and how necessary to salvation the preservation of peace is.
Why did God permit Thomas to disbelieve the appearance of Christ to the other disciples?
That we might thereby be strengthened in faith, for as Christ took away all doubt from Thomas, by appearing again, the resurrection of Christ by that means becomes, as St. Gregory says, so much the more credible and certain.
What is it to believe in God?
To receive as immovably certain what God has revealed to us, although we cannot understand it.
What must we, therefore, believe? All that God has revealed.
Why must we believe all this?
Because God, the infallible truth, has revealed it. This belief is as necessary to salvation as it is reasonable in itself.
How can we certainly know what God has or has not revealed, and which this one true faith is?
Through His Church, which is guided by the Holy Ghost to all truth, and in which Jesus Christ dwells till the end of time.
How can we know the Church of Christ? By this, that, like the truth, she is one, holy, apostolic, and catholic.
Which is this true Church of Christ?
The Roman Catholic, since she alone possesses the above-mentioned marks of the true Church. She alone has preserved unity in faith and in the holy sacraments, and is subordinate to one visible head, the Pope. She alone can trace her derivation
