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.

Over Population

Boyd K. Packer, “The Plan of Happiness,”Ensign or Liahona, May 2015, 26–27
“The commandment to multiply and replenish the earth … is essential … and is the source of human happiness. Through the righteous exercise of this [creative] power, we may come close to our Father in Heaven and experience a fulness of joy, even godhood. The power of procreation is not an incidental part of the plan; it is the plan.”

Anger at Church Policies

2 Nephi 28:19-20
19 For the kingdom of the devil must shake, and they which belong to it must needs be stirred up unto repentance, or the devil will grasp them with his everlasting chains, and they be stirred up to anger, and perish;
20 For behold, at that day shall he rage in the hearts of the children of men, and stir them up to anger against that which is good.

2 Nephi 28:28
28 And in fine, wo unto all those who tremble, and are angry because of the truth of God! For behold, he that is built upon the rock receiveth it with gladness; and he that is built upon a sandy foundation trembleth lest he shall fall.

The After Life - Post Death and Pre Resurrection

History of the Church, 6:52; included in Teachings of the Prophet Joseph Smith, 326; often quoted, as in Henry B. Eyring, To Draw Closer to God (1997), 122; see also Teachings of Presidents of the Church: Brigham Young (1997), chapter 38, “The Spirit World.”
“The spirits of the just are exalted to a greater and more glorious work … [in] the world of spirits. … They are not far from us, and know and understand our thoughts, feelings, and motions, and are often pained therewith.”

President Dallin H Oaks, Trust in the Lord, October 2019 General Conference
“...family members who were righteous will be together in the world of spirits.”

Alma 40:12 
12 And then shall it come to pass, that the spirits of those who are righteous are received into a state of happiness, which is called paradise, a state of rest, a state of peace, where they shall rest from all their troubles and from all care, and sorrow.

If We Are Prepared, We Shall Not Fear

Elder Quentin L Cook, Shipshape and Bristol Fashion: Be Temple Worthy—in Good Times and Bad Times, October 2015 General Conference
"...the storms and temptations of this life are often unpredictable. But this we know: they will come! In order to overcome the challenges and temptations that each of us inevitably faces, it will require righteous preparation and the use of divinely provided protections. We must determine to be temple worthy regardless of what befalls us. If we are prepared, we shall not fear."

Testimony Meeting

Elder M Russell Ballard, God Is at the Helm, October 2015 General Conference

"This same spirit of worship should permeate our monthly fast and testimony meetings. This sacrament meeting is for members to briefly express gratitude, love, and appreciation for our Heavenly Father, Jesus Christ, and the restored gospel and to bear personal witness of these things. Fast and testimony meeting is a time to share brief inspirational thoughts and bear solemn testimony. It is not a time to give a speech.

"Young children should practice sharing their testimonies in Primary and with their parents in family home evening gatherings until they understand the important meaning of a testimony."

Gift of Tongues

1 Corinthians 14