How do we know that suffering can lead to spiritual fruitfulness?

The article explains that throughout Christian history, many of the most fruitful saints have experienced profound affliction. This affliction serves as a divine tool for spiritual pruning, enabling believers to ultimately bear much fruit. The relationship between trials and spiritual fruitfulness is exemplified in the lives of those whom the Lord has most deeply dealt with. Their afflictions led to self-distrust and a deeper reliance on Christ, which in turn produced precious fruit in their lives. Thus, suffering is not without purpose, but rather, it is a sacred means through which God cultivates growth and holiness in His people.