Humility is truth. It takes away self-doubt and self-loathing. It helps us to see who we are and who God is. And it makes it all bearable. In this rule St Ignatius focuses in on the importance of humility in times of consolation and in times of desolation. Our focus is so much clearer when we are looking at Christ and not ourselves.
Eleventh Rule. The eleventh: Let him who is consoled see to humbling himself and lowering himself as much as he can, thinking how little he is able for in the time of desolation without such grace or consolation. On the contrary, let him who is in desolation think that he can do much with the grace sufficient to resist all his enemies, taking strength in his Creator and Lord.
Humility really does lead to peace.