Constancy is the quality of being constant; steadiness or faithfulness in action, affections, purpose, and so forth. It indicates an unchanging quality or characteristic of a person or thing. It is the opposite of inconstancy.
- Through perils both of wind and limb,
Through thick and thin she follow'd him.
- Samuel Butler, Hudibras, Part I (1663-64), Canto II, line 369.
- Changeless march the stars above,
Changeless morn succeeds to even;
And the everlasting hills,
Changeless watch the changeless heaven.
- Charles Kingsley, Saint's Tragedy (1848), Act II, scene 2.
- Now from head to foot
I am marble-constant: now the fleeting moon
No planet is of mine.
- O constancy, be strong upon my side,
Set a huge mountain 'tween my heart and tongue!
I have a man's mind, but a woman's might.
- I could be well moved if I were as you;
If I could pray to move, prayers would move me;
But I am constant as the northern star,
Of whose true fix'd and resting quality
There is no fellow in the firmament.
- He that parts us shall bring a brand from heaven,
And fire us hence like foxes.
- Sigh no more, ladies, sigh no more,
Men were deceivers ever,
One foot in sea and one on shore;
To one thing constant never.
- If ever thou shalt love,
In the sweet pangs of it remember me;
For such as I am all true lovers are;
Unstaid and skittish in all motions else,
Save in the constant image of the creature
That is belov'd.
- I would have men of such constancy put to sea, that their business might be everything and their intent everywhere; for that's it that always makes a good voyage of nothing.
- O heaven! were man
But constant, he were perfect. That one error
Fills him with faults; makes him run through all the sins:
Inconstancy falls off ere it begins.
- Through thick and thin, both over banck and bush,
In hope her to attaine by hooke or crooke.
- Edmund Spenser, The Faerie Queene (1589-96), Book III, Canto I, Stanza 17.
Hoyt's New Cyclopedia Of Practical Quotations 
- Quotes reported in Hoyt's New Cyclopedia Of Practical Quotations (1922), p. 132-33.
- 'Tis often constancy to change the mind.
- John Hoole, Metastasio, Sieves.
- Abra was ready ere I call'd her name;
And, though I call'd another, Abra came.
- Matthew Prior, Solomon on the Vanity of the World, Book II, line 364.
- Out upon it! I have lov'd
Three whole days together;
And am like to love three more,
If it prove fair weather.
- Sir John Suckling, Constancy.