Your experience has proven that poor, weak impressions are recalled
slowly and with difficulty. At the same time when you succeed in
recalling a poorly made impression it is indistinct, it lacks that
clear definiteness which brings assurance and confidence. To overcome
this you need to sharpen the tools with which the impressions are made
upon the brain. You cannot expect the best results from untrained
senses any more than a carpenter can expect to do a fine quality of
work with dull tools.
The senses can be sharpened and improved as you have seen in the First
Book, but practice is the whetstone and every stroke will produce
its proportionate result; without it you can not expect to become
proficient in anything. The methods by which the senses can be trained
are suggested in the First Book, and if they have been overlooked, or
slighted, you can now see the importance of paying proper attention to
them.
=Practice is the motive power which can propel you along the road
of progress toward the goal of perfection.=