You should be afraid of making mistakes, all of us should.

你们应当担心犯错，我们所有的人都应当担心犯错！

youdao

For it is God's servant for your good, but if you do what is wrong you should be afraid, for the authority does not bear the sword in vain.

因为他是神的佣人，是与你有益的，你若作恶，却当惧怕，因为他不是空空的佩剑。

youdao

You should not be afraid to aim high in the quest for an improvement in your income.

在寻求收入提高方面，你应该敢于给自己设定高的目标。

《柯林斯英汉双解大词典》

"Neither one means failure is imminent or that your life is in danger or that you should be afraid to get in your car, " he said.

CNN: Experts: Leadership, money keys to building bridges

You can draw whatever life lessons you like from that, but the main thing is clear: No one should ever be afraid for Mariano Rivera, and if by some chance he decides to come back for another year, he'll devise some way to make it another nearly perfect one.

WSJ: Mariano Rivera's Key: Change...Oh, and Cutter