There are some griefs so overwhelming and all-encompassing that we are stunned by loss. During those times the Lord sustains us; when we are blind and deaf from pain, He holds on. I don't think this post addresses grief of that caliber.
However, when land that had been in our family for 150 years sold recently, I grieved as though I was a child who had lost her home. As I sought the Lord regarding the soul-wrenching depth of this sorrow, the following guidance emerged:
Remember that although you are cemented to a specific point in time, God is above time and space. He is sovereign over your past, present, and future, and nothing is beyond His reach: "He is before all things, and in him all things hold together" (Colossians 1:17).
Love does not die. A person, beloved place, or precious pet may no longer be with you, but to replace the reality of love with a shrine to grief is to replace what is real and will last forever (love) with something that is transient (grief of loss). "Love never ends" (1 Corinthians 13:8 ESV). "Gladness and joy will overtake them, and sorrow and sighing will flee away" (Isaiah 51:11).
If loss of something of this Earth causes you to feel as though your moorings have been cut, use this opportunity to attach yourself more deeply to the Lord, because He will not abandon you. "God has said, 'Never will I leave you; never will I forsake you'" (Hebrews 13:5). "I will not leave you as orphans; I will come to you" (John 14:18).
Abstain from the forms of pain relief utilized by those who don't know the Lord. Discipline of the flesh allows the mind understanding of what the heart already knows: all is well. "Since we live by the Spirit, let us keep in step with the Spirit" (Galatians 5:25).
Don't substitute another person or place for heart needs that can only be filled by a relationship with God. "All my fresh springs shall be in Thee" (Psalm 87:7 P.B.V.)
Refuse to exchange the reality of past blessing for the grief of the present moment. Grief is a temporary passage, not a permanent condition. "...do not grieve like the rest of mankind, who have no hope" (1 Thessalonians 4:13).
Make your heart's home in Christ, and through Him participate in the reality that encompasses all time and eternity. Past, present, and future, you are safe in Him. “I am the Alpha and the Omega,” says the Lord God, “who is, and who was, and who is to come, the Almighty” --Revelation 1:8