Only God's plan for salvation will work. What is it? Holding grievances is the opposite of that. The grievances we hold, the attack thoughts we project about external people and things, is in opposition to our "salvation." Do we want a peaceful world or do we choose to live in the conflicts of our own grievances and opinions?
1) Only God's plan for salvation will work.
2) Holding grievances is an attack on God's plan for salvation.