Yes, the Bible is very true though many would not agree.
Check out some of the other questions. It is a world’s bestseller and 4,000 years old.
As for signs, we do not get many clearly obvious ones today, some do. Why?
Well we know so much about what God did on many occasions in the old and the new testaments. These examples tell us much about how God works. We also have books called Bible Commentaries. They explain many things that puzzle some people and enlarge the verse so we can get the full meaning.