这是一个由 if 引导的条件句，表达了因果关系。
Waiting for opportunity is a clumsy way to act. — Anonymous
Opportunities that come must not be lost; chances that arise must be seized. — Su Shi
Man cannot create timing, but he can seize the opportunities that appear. — Shelley
The truly successful people in this world are often not the first-class brilliant ones, but those who are second-class smart and second-class foolish. Being too smart can make one see through everything and refuse to do 'foolish' things or put in tedious effort, thus losing hope. — Anonymous
It is extremely important to be good at identifying and grasping opportunities. In all great undertakings, one must observe timing like a thousand-eyed deity before beginning, and seize it like a thousand-handed deity during execution. — Bacon
Searching everywhere in vain, only to find it with little effort when it finally arrives. — Shi Naian
If a good opportunity does not come, create it yourself. — Carmichael
Pay attention to every profitable moment; once the opportunity arrives, do not let it slip away, lest you regret it for a lifetime. — Anonymous
Whichever day you decide to act shall be the auspicious day. — Anonymous
One should seize the moment of opportunity. — Anonymous
The brightest flames of joy are perhaps ignited by unexpected sparks. The fragrant flowers that occasionally bloom on life's path also grow naturally from seeds dropped by chance. — Samuel Johnson
An optimist sees an opportunity in every disaster, while a pessimist sees a disaster in every opportunity. — Anonymous
等待机会，是一种十分笨拙的行为。——佚名
来而不可失者时也，蹈而不可失者机也。——苏轼
人不能创造时机，但是他可以抓住那些已经出现的时机。——雪莱
这世界上真正有成就的往往不是第一流的聪明人，而是第二流聪明加第二流愚笨的那种人。太聪明，就把什么都看开了，不肯做傻事，花笨功夫了，也就没希望了。——佚名
善于识别与把握时机是极为重要的。在一切大事业上，人在开始做事前要象千眼神那样察视时机，而在进行时要象千手神那样抓住时机。——培根
踏破铁鞋无觅处，得来全不费功夫。——施耐庵
如果良机不来，就亲手创造吧。——欺迈尔斯
要留意任何可利的瞬间，机会到了，莫失之交臂，遗憾终生。——佚名
想哪天干，那天就是吉日。——佚名
应该抓住机会的额发。——佚名
最明亮的欢乐火焰大概都是由意外的火花点燃的。人生道路上不时散发出芳香的花朵，也是从偶然落下的种子自然生长起来的。——塞缪尔·约翰逊
乐观主义者从每一个灾难中看到机遇，而悲观主义都从每一个机遇中看到灾难。——佚名
"A good life is one you create for yourself."
"The first youth is a gift from God; the second youth is created through your own efforts."
"We each create our own world."
"Learning is the comprehension of others; innovation is the creation of self."
"Life is not a process of discovery, but a process of creation."