Even the Holy Scripture admonishes us in

Roman 12:15-16

15 Rejoice with those who rejoice, and weep with those who weep. 16 Be of the same mind toward one another. Do not set your mind on high things, but associate with the humble. Do not be wise in your own opinion.

Most times, we are the product of our thoughts... The more we wish evil on other, the more we envisage downfall for others - the more those evil intents are retured to us in multiple folds.