It is true, regardless of whether it is believed or not, because its Author existed before all things. The Truth is Life, and by Him were all things created:
6 Jesus said to him, “I am the way, the truth, and the life. No one comes to the Father except through Me. John 14
"A wicked and adulterous generation seeks after a sign, and no sign shall be given to it except the sign of the prophet Jonah.” Matt. 16:4
And when you pray, do not use vain repetitions as the heathen do. For they think that they will be heard for their many words. Matt. 6
5 If any of you lacks wisdom, let him ask of God, who gives to all liberally and without reproach, and it will be given to him.
6But let him ask in faith, with no doubting,for he who doubts is like a wave of the sea driven and tossed by the wind.
7For let not that man suppose that he will receive anything from the Lord;
8 he is a double-minded man, unstable in all his ways. James 1