|The Magi, from the St Alban's Psalter, 12th century|
It's from the Latin desidero, which like 'consider' comes from sidus, sideris - a star.
My desire is my guiding star, my lodestar - to follow it is to find Epiphany.
May He give you your heart's desire... Psalm 20
You have granted him his heart's desire; you have not refused the prayer of his lips. Psalm 21
Our one desire and choice should be the end for which we were created... To praise, reverence and serve God our Lord... All other things on the face of the earth are created for us to help us. Spiritual Exercises #23
...to ask for what I desire... Spiritual Exercises #55 and passim