"Asthenia" redirects here. The tortrix moth genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 is nowadays considered a junior synonym of
Epinotia is a very large genus of tortrix moths . It belongs to the tribe Eucosmini of subfamily Olethreutinae.-Species:166 species of Epinotia were considered valid as of 2009...


Weakness is a symptom represented, medically, by a number of different conditions, including: lack of muscle strength, malaise
Malaise is a feeling of general discomfort or uneasiness, of being "out of sorts", often the first indication of an infection or other disease. Malaise is often defined in medicinal research as a "general feeling of being unwell"...

, dizziness
Dizziness refers to an impairment in spatial perception and stability. The term is somewhat imprecise. It can be used to mean vertigo, presyncope, disequilibrium, or a non-specific feeling such as giddiness or foolishness....

, or fatigue. The causes are many and can be divided into conditions that have true or perceived muscle weakness. True muscle weakness is a primary symptom of a variety of skeletal muscle diseases, including muscular dystrophy
Muscular dystrophy
Muscular dystrophy is a group of muscle diseases that weaken the musculoskeletal system and hamper locomotion. Muscular dystrophies are characterized by progressive skeletal muscle weakness, defects in muscle proteins, and the death of muscle cells and tissue.In the 1860s, descriptions of boys who...

 and inflammatory myopathy
Inflammatory myopathy
Inflammatory myopathy is a form of myopathy that involves inflammation of the muscle.Inflammatory myopathy is generally synonymous to the term dermatopolymyositis, which, according to ICD-10 encompasses three related diseases: polymyositis, dermatomyositis, and inclusion-body...


All cruelty springs from weakness.

Seneca the Younger

Although men are accused of not knowing their own weakness, yet perhaps few know their own strength. It is in men as in soils, where sometimes there is a vein of gold which the owner knows not of.

Jonathan Swift

As you simplify your life, the laws of the universe will be simpler; solitude will not be solitude, poverty will not be poverty, nor weakness weakness.

Henry David Thoreau

Credulity is the man's weakness, but the child's strength.

Charles Lamb

Do you really think it is weakness that yields to temptation? I tell you that there are terrible temptations which it requires strength, strength and courage to yield to.

Oscar Wilde

Get it into your head once and for all, my simple and very fainthearted fellow, that what fools call humanness is nothing but a weakness born of fear and egoism; that this chimerical virtue, enslaving only weak men, is unknown to those whose character is formed by stoicism, courage, and philosophy.

Marquis De Sade

I believe the most solemn duty of the American president is to protect the American people. If America shows uncertainty and weakness in this decade, the world will drift toward tragedy. This will not happen on my watch.

George W. Bush

If thou wouldn't conquer thy weakness thou must not gratify it.

William Penn

If we resist our passions, it is more due to their weakness than our strength.

François de La Rochefoucauld

Insincerity is always weakness; sincerity even in error is strength.

George Lewes