Well, first of all, do you believe in the doctrine of the Trinity? If you do, then by what authority do you believe in it? It isn’t mentioned in the Bible. It is essentially “a rule made up by the Catholic Church.” Do you believe in the Hypostatic Union, the doctrine that Our Lord was completely God and completely Man? If you do, by what authority do you believe it? This was also not articulated in the Bible and is “a rule made up by the Catholic Church.”
ALL Christian bodies agreed at one point that artificial birth control was sinful…until 1930, when the Lambeth Council, a gathering of Anglican bishops held ever ten years at the behest of the Archbishop of Canterbury, said that it wasn’t. Since then, the various denomination/eccelsial bodies, etc., have dropped like dominoes and given in. For 1930 years, Christendom (and I use that term advisedly) stood in agreement on this score (and artificial birth control existed since ancient times, condoms being made of sheep and pig intestines).
The Church has held since Her foundations that artificial birth control was an evil and until 1930, even those who split off from her agreed.
All that is in the Bible is true, but not all truth is contained in the Bible.