Achievement

"A sense of achievement puts bar to advancement. The person automatically stops making any efforts, and in this lies the greatest danger to one's progress." A sense of achievement or accomplishment breeds a sense of complacency in our minds, and thus puts a stop to all further effort and to progress.

Source: P. Rajagopalachari, Chapter "As Above, So Below," The Principles of Sahaj Marg, Set 1, Vol. III, p. 369.