Righteousness and faith certainly are instrumental in healing the sick, deaf, or lame - if such healing accomplishes God's purposes and is in accordance with His will. Thus, even with strong faith, many mountains will not be moved. And not all of the sick and infirm will be healed.

Many of the lessons we are to learn in mortality can only be received through the things we experience and sometimes suffer. And God expects and trusts us to face temporary mortal adversity with His help so we can learn what we need to learn and ultimately become what we are to become in eternity.

If all opposition were curtailed, if all maladies were removed, then the primary purposes of the Father's plan would be frustrated.

David A. Bednar Quotes