It seems too good to be true only because mankind has known the bad for so many centuries. Jehovah created the earth and told mankind to fill it with righteous men and women who would care for its plant and animal life and preserve its beauty instead of destroying it. Rather than that promised Paradise being too good to be true, the present sorrowful state is too bad to continue. Paradise will replace it. Faith in these promises is not a matter of credulity.
Faith follows the thing heard.
By studying God's Word, its wisdom becomes apparent and faith grows. Biblical archaeology confirms much of the Bible's historical accuracy. True science harmonizes with the Bible. The inspiration of the Bible is shown by fulfilled prophecies. Daniel foretold in advance the rise and the fall of world powers, as well as the time when the Messiah would come and be put to death.