Objectives can be compared to ...

Objectives can be compared to a compass bearing by which a ship navigates. A compass bearing is firm, but in actual navigation, a ship may veer off its course for many miles. Without a compass bearing, a ship would neither find its port nor be able to estimate the time required to get there.
Objectives can be compared to a compass bearing by which a ship navigates. A compass bearing is firm, but in actual navigation, a ship may veer off its course for many miles. Without a compass bearing, a ship would neither find its port nor be able to estimate the time required to get there.

Quotes from the same author

The entrepreneur always searches for change, responds to it, and exploits it as an opportunity.
Efficiency is doing things right; effectiveness is doing the right things.
The best way to predict your future is to create it.
There is nothing so useless as doing efficiently that which should not be done at all.
Follow effective action with quiet reflection. From the quiet reflection will come even more effective action.