Mark 16:15 And he (Jesus) said unto them (the eleven) 'Go ye (the eleven) into all the world (mankind), and preach the gospel to every creature (mankind).'
16:16 'He (mankind) that believeth and is baptised (by one or more of the eleven) shall be saved; but he (mankind) that believeth not shall be damned.'
16:17 'And these signs (coming up) shall follow them (baptised mankind) that
believe; In my (Jesus) name shall they (baptised mankind) cast out devils; they (baptised mankind)shall speak with new tongues.'
16:18 'They (baptised mankind)shall take up serpents; and if they (baptised mankind) drink any deadly thing, it (deadly thing) shall not hurt them (baptised mankind); They (baptised mankind) shall lay hands on the sick, and they (the sick) shall recover.'
16:20 And they (the eleven) went forth, and preached everywhere, the Lord working with them (the eleven), and
confirming the word with signs following ( baptised mankind fulfilling Jesus` words)
What`s so difficult to understand about these Scriptures?