Be modest in learning,for complacency is the enemy of study.

学习要虚心,是敌人。

Conceit and complacency are the archenemy of unity.

骄傲是团结的大敌。

Setbacks can be a good thing, forcing you out of your complacency.

挫折或许是件好事, 它可以迫使你克服情绪。

Complacency is a drawback to progress.

是进步的障碍。

Complacency could easily result in tragedy.

容悲剧。