the Bible is not only books of instructions it's also a book of prophecy, the bible was written to edify us it's a book of prophecy about our future so if a believer wants to know about their tomorrow they should look into the scriptures.
like we see of Jesus his coming was foretold by prophets of old Isaiah prophesy of his coming way from the old testament and also before his coming John the Baptist came as a fore-runner announcing his coming,
our future was already documented in God's words like he said in Jeremiah before you were foremd in your mother's womb I knew you and predestined you.
God has our whole life planned out in his will and if we abide in his will for us we will have a great future...