Reject negative movements

Be careful to reject always movements (like vexation, discontent etc.) that bring back confusion or depression. One cannot always help these movements coming, but one can reject them when they come; the more they are rejected, the more difficult it becomes for them to recur—or, if they recur, they hold only for a moment and then drop away. To entertain them means to give them a chance to cover the true consciousness once more.

Ref: Letters on Yoga Vol. IV