Well a sign you want got to answer is 39 But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the sign of the prophet Jonas: but it is up to the person to believe or not if a person does not believe then it is useless for that person but the future may change the outcome of things it is also written : 16 He that believeth and is baptized shall be saved; but he that believeth not shall be damned.
17 And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues;
18 They shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover.
19 So then after the Lord had spoken unto them, he was received up into heaven, and sat on the right hand of God. The Lord was very plain on yhis matter , I have personally cast out demons rebuked death and healed the sick I havent yet raised the dead but i know persons that have persosonaly i also prophesied but you must believe e