Ramayana: While searching for Sita, what queered the effort was Hanuman’s celibacy:
“Was it right for him to peer into a woman’s private chambers even if his intentions were pure?”
Mahabharata: What queered the war against evil for Arjuna was the presence on the opposite side of many virtuous venerable elders such as Bhishma and Drona.
Bhagavad-gita: Nothing queers our efforts for self-improvement as our mind with its moodiness.
In so far as we consider them as obstacles, failures can queer our spiritual progress; otherwise, they can be harnessed as pillars of spiritual growth.
The mind considers such a spiritual understanding queer and makes our life queer.