DO NOT SCATTER YOUR POWERS

 Engage in one kind of business only, and stick to it faithfully until you succeed, or until your experience shows that you should abandon it. A constant hammering on one nail will generally drive it home at last, so that it can be clinched¹. When a man's undivided attention is centered on one object, his mind will constantly be suggesting improvements² of value, which would escape him if his brain was occupied by a dozen different subjects at once. Many a fortune has slipped through a man's fingers because he was engaged in too many occupations at a time. There is good sense in the old caution³ against having too many irons in the fire at once.

 

1 clinched   

v.（尤指两人）互相紧紧抱[扭]住( clinch的过去式和过去分词 )；解决（争端、交易），达成（协议）

参考例句：

• The two businessmen clinched the deal quickly. 两位生意人很快达成了协议。 来自《简明英汉词典》
• Evidently this information clinched the matter. 显然，这一消息使问题得以最终解决。 来自辞典例句

2 improvements   

增加或修改( improvement的名词复数 )； 改进； 改善； 改良

参考例句：

• improvements in efficiency at the factory 工厂效率的提高
• They've spent a lot of money on home improvements. 他们花了很多钱装修家居。

3 caution   

n.小心，谨慎，警告；vt.告诫，警告

参考例句：

• You should exercise extreme caution when driving in fog.在雾中开车要极为小心。
• There is no need for such caution.不必如此小心谨慎。