Their contents must be understood, then faithfully applied with care to the individual situation. Some Scripture is designed for teaching. Other is intended for reproof, other for correction. Part of it is given for positive instruction in righteousness. The medicine is well prepared.
Wisdom is needed only in diagnosing the malady and administering the remedy.
If the Bible has ever appeared to be irrelevant, it is because someone either did not give the part of it that was needful or those who needed it did not receive it to their profit. It is wrong to fail to apply the message where needed. That means positive application at times and negative dosage at others. It is also wrong to change the message to suit the one who hears it. Jesus never instructed anybody to make His teaching acceptable to the crowds.