Both deterrents prevent that prime characteristic of expression--spontaneity.
_Anxiety_ is a great contractor of muscle, a great stiffener.

Anxiety always forgets the _power_ within, and falsely says to the song-hunger, "You shall never be satisfied." _Self-repression_ is a great deterrent that afflicts the more sensitive, particularly those of puritanic inheritance.

It is a devitalizer and a direct negative to expression, which is vital, is _life_.
All of these deterrents are negative and may be overcome by fuller recognition of the inner power that by its very nature must perpetually seek positive expression.
CONCLUSION In conclusion, the student can perpetually find encouragement in a number of happy facts.
Man is endowed by nature, except in rare instances, with a perfect vocal apparatus.

When abnormal conditions are found they are usually in the adult voice, and are due solely to misuse.

In other words defects are not inherent but acquired and _can be removed_.
By nature the human voice is beautiful, for the tendency of nature is always in the direction of beauty.