Only by learning the examples of praise and putting them into practice can a person build a strong spiritual life, a relationship with G-d based on solid faith. Praise takes many forms and flows with our emotions, or in spite of them. It is the standing in faith, believing that G-d's word is true and His love and care are dependable and eternal. We give Him thanks and honor in the good times and the bad. Praise puts our fears to flight and breaks down the barriers that keep blessings from flowing to us.
Praise is spiritual warfare in the face of insurmountable odds.
Like Leah's, our praise can turn the situation within ourselves around and make our lives, not just more bearable, but triumphant. Like David's example, praise can come into every part of our lives, celebrating victory or turning sorrow to gladness, simply spending time recounting G-d's wonders or putting a demonic presence to flight. As in Jehoshaphat's case, we can see battles miraculously fought for us, as we exalt our great G-d through words of praise, song, dance, and music. Examples of praise are in the Tanach , because G-d wants us to mature and partake of the higher fruits of spiritual life, just as our forefathers did. Just as physical exercise strengthens muscles and enables one to manage heavier burdens, exercising praise strengthens our faith and enables us to handle heavier spiritual burdens.