A bold attempt is half success.（勇敢的尝试是成功的一半。）

One today is worth two tomorrows.（一个今天胜似两个明天。）

Do one thing at a time, and do well.（一次只做一件事，做到最好!）

Keep on going never give up.（勇往直前，决不放弃!）

Failure is the mother of success.（失败乃成功之母。）

The reason why a great man is great is that he resolves to be a great man.（伟人之所以伟大，是因为他立志要成为伟大的人。）

Life is a horse, and either you ride it or it rides you.（人生像一匹马，你不驾驭它，它便驾驭你。）

The best preparation for tomorrow is doing your best today.（对明天做好的准备就是今天做到最好。）

When all else is lost the future still remains.（当一切失去时，未来依然存在。）

Believe in yourself.（相信你自己!）

Time is money.（时间就是金钱。）

Throw what you should throw, give up when you should, and from today on, be a layman for the rest of your life, and live with your best attitude.（该扔的就扔，该放弃就放弃，从今天起，余生做个俗人，以自己最好的姿态生活。）

这些短句涵盖了勇气、坚持、失败与成功、时间的价值、自信等主题，适合在需要激励时引用。希望这些句子能给你带来正能量!