Heavenly Mother

President Dieter F Uchtdorf, A Yearning for Home, October 2017 General Conference
"I believe that every man, woman, and child has felt the call of heaven at some point in his or her life. Deep within us is a longing to somehow reach past the veil and embrace Heavenly Parents we once knew and cherished."

Spencer W. Kimball, “Privileges and Responsibilities of Sisters,” Ensign, Nov. 1978, 105
“God is your Father. He loves you. He and your mother in heaven value you beyond any measure. … You are unique. One of a kind, made of the eternal intelligence which gives you claim upon eternal life.”

President Dieter F Uchtdorf, O How Great the Plan of Our God!, October 2016 General Conference
"I remember trying to draw the plan of salvation on a blackboard in a classroom of our chapel in Frankfurt, Germany. I made circles that represented premortal life, mortality, and the return to our Heavenly Parents after this life."
...
"Brothers and sisters, we are eternal beings, without beginning and without end. We have always existed.1 We are the literal spirit children of divine, immortal, and omnipotent Heavenly Parents!"
...
"When we passed through the veil and entered this mortal life, we knew that we would no longer remember the life before. There would be opposition and adversity and temptation. But we also knew that gaining a physical body was of paramount importance for us. Oh, how we hoped that we would quickly learn to make the correct choices, withstand the temptations of Satan, and eventually return to our beloved Parents in Heaven."

Pre-existence

Jeremiah 1:5

 5 Before I formed thee in the belly I knew thee; and before thou camest forth out of the womb I sanctified thee, and I ordained thee a prophet unto the nations.

Proverbs 8:22-31

 22 The Lord possessed me in the beginning of his way, before his works of old.

 23 I was set up from everlasting, from the beginning, or ever the earth was.

 24 When there were no depths, I was brought forth; when there were no fountains abounding with water.

 25 Before the mountains were settled, before the hills was I brought forth:

 26 While as yet he had not made the earth, nor the fields, nor the highest part of the dust of the world.

 27 When he prepared the heavens, I was there: when he set a compass upon the face of the depth:

 28 When he established the clouds above: when he strengthened the fountains of the deep:

 29 When he gave to the sea his decree, that the waters should not pass his commandment: when he appointed the foundations of the earth:

 30 Then I was by him, as one brought up with him: and I was daily his delight, rejoicing always before him;

 31 Rejoicing in the habitable part of his earth; and my delights were with the sons of men.