"You must believe in truth that whatever God gives or permits is for your salvation." (St. Catherine of Siena)

The many struggles of life that we experience are not without purpose or merit as long as they are not of our own making, because of sin. God allows us to experience them for our purification and transformation in preparation for something greater, life eternal with him. It is hard for us to see beyond the moment. We need to pray for the grace to persevere through the difficulties, so we can embrace his perfect will for us. His perfect will is our eternal salvation. So we are call "to walk by faith and not by sight", so that what we cannot see or achieve, will be given to us by God.