Premanand Maharaj Ji
Why is jealousy among fellow devotees so harmful?
Jealousy leads to criticism and fall
Jealousy burns you, then leads to criticism and fault-finding, and then your fall. Instead, bow humbly and pray to the saints of Vrindavan that a little bhakti may come to you.
Jealousy will burn you, and then you will start criticising and finding faults in others. Then you will fall.