The Bible consistently assures us that living biblically is the best way for us to live (cf. 2 Timothy 3:16-17). However, I cannot prove to you that this is so. A relationship with God, like all other relationships, requires a commitment that transcends the evidence and becomes self-validating. You cannot prove you should take a job until you accept it. You cannot prove you should get married or have children until you get married and have children.
When you take God at his word, you discover that he always keeps his word. Conversely, as theologian J. V. Langmead Casserley noted, we do not break God’s word: we break ourselves on God’s word. The choice is yours.