You like to take favorite verses out of context don't you! Mark 16:16-18
16 He who believes and is baptized will be saved; but he who does not believe will be condemned. 17 And these signs will follow those who believe: In My name they will cast out demons; they will speak with new tongues; 18 they will take up serpents; and if they drink anything deadly, it will by no means hurt them; they will lay hands on the sick, and they will recover.”
And yes, there are dramatic evidences.
1 Corinthians 1:4-9
4 I thank my God always concerning you for the grace of God which was given to you by Christ Jesus, 5 that you were enriched in everything by Him in all utterance and all knowledge, 6 even as the testimony of Christ was confirmed in you, 7 so that you come short in no gift, eagerly waiting for the revelation of our Lord Jesus Christ, 8 who will also confirm you to the end, that you may be blameless in the day of our Lord Jesus Christ. 9 God is faithful, by whom you were called into the fellowship of His Son, Jesus Christ our Lord.
Christianity and being saved is not all theology. It is experience.