Steadfastness - like the trees

Steadfastness is indispensable these dark hours of human history. The Blessed Beauty praises those who bear trials with steadfastness.

A twofold obligation resteth upon him who hath recognized the Day Spring of the Unity of God, and acknowledged the truth of Him Who is the Manifestation of His oneness. The first is steadfastness in His love, such steadfastness that neither the clamor of the enemy nor the claims of the idle pretender can 290 deter him from cleaving unto Him Who is the Eternal Truth, a steadfastness that taketh no account of them whatever. The second is strict observance of the laws He hath prescribed—laws which He hath always ordained, and will continue to ordain, unto men, and through which the truth may be distinguished and separated from falsehood. 
(Bahá'u'llah in Gleanings from the Writings of Bahá'u'lláh, pages 289 to 290)

Steadfastness is also praised by 'Abdu'l-Bahá

Today, the greatest of all titles and praises are firmness and steadfastness, for the tests and trials are of the utmost intensity. I ask God that day by day thou mayest increase in steadfastness, so like unto a solid rock thou mayest withstand the tempestuous sea of test.

The people of the world are like unto trees (i.e., trees without roots), they are torn up by the passing of a gust of wind, but trees which are deeply rooted, strong and sturdy, are not uprooted by the most violent tempest—therefore they produce leaves, blossoms and fruits.

('Abdu'l-Bahá in Tablets of Abdu'l-Bahá Abbas, page 683)

Steadfastness is also praised in this poem that was a favorite of Nelson Mandela's. By William Ernest Henley. 1849-1903

Invictus

OUT of the night that covers me,
  Black as the pit from pole to pole,
I thank whatever gods may be
  For my unconquerable soul.

In the fell clutch of circumstance
  I have not winced nor cried aloud.
Under the bludgeonings of chance
  My head is bloody, but unbow'd.

Beyond this place of wrath and tears
  Looms but the Horror of the shade,
And yet the menace of the years
  Finds and shall find me unafraid.

It matters not how strait the gate,
  How charged with punishments the scroll,
I am the master of my fate:
  I am the captain of my soul.