2 Timothy 3:16
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
This isn’t the first time that Bohm Bawerk, a proclaiming(atheist), asked such a question and we have responded truthfully with scripture.
He refuses to accept the truth of scripture. That is evident by him posting another thread questioning truth of scripture.
1 John 4:6
We are of God: he that knoweth God heareth us; he that is not of God heareth not us. Hereby know we the spirit of truth, and the spirit of error.
Paul warns in Colossians.
Colossians 2:8
Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ.
Revelation 19:6
And I heard as it were the voice of a great multitude, and as the voice of many waters, and as the voice of mighty thunderings, saying , Alleluia: for the Lord God omnipotent reigneth.
John 14:26
But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance , whatsoever I have said unto you.
1 Peter 3: 15 thru 16
15 But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear:
16 Having a good conscience; that, whereas they speak evil of you, as of evildoers, they may be ashamed that falsely accuse your good conversation in Christ.
Proverbs 9:8
Reprove not a scorner, lest he hate thee: rebuke a wise man, and he will love thee.